AC generators [alternators] AC motors and DC motors [not including those for land vehicles but including parts for any AC motors and DC motors] Actuators for air vehicles Aeronautical engines Aeronautical motors Agricultural implements Air separation apparatus Air suction machines All being accessories to photo-type and relief printing Ammonia plants annealing machines. Anti-pollution devices for motors and engines apparatus for dressing for metalworking apparatus for giving a pickling treatment on the surface of metal apparatus for metalworking machining apparatus for tin-plating on the surface of metal Asphalt finishers Automobile crank shafts and camshafts Axles for machines Back-hoe dragline and hydroexcavators Bars and copper plates Bars and zinc plates Bearings [machine elements not for land vehicles] Bearings for transmission shafts Beier variators Beier-Cyclo variators Being speed reducers or variators Belts for conveyors Belts for machines Belts for motors and engines bending machines Blow moulding machines Boiler tubes [parts of machines] Brakes [machine elements not for land vehicles] Brass sheets Bucket wheel reclaimers Butane carburettors Carburettor feeders Carburettors Casting machines, for non-ferrous metals Cement plants Centrifuges [machines] Centrifuges being centrifugal separators Chain feeders for ball mills Chemical oxidative synthesizing apparatus Chemical processing machines and apparatus Clamshell Classifier Classifier for classifying solids suspended in liquids, being a machines Coal and ore dressing plants Cold strip mills for non-ferrous metals compressed air machines compressed air pumps compressors (machines) Condensers [steam] [parts of machines] condensing installations for chemical processing Construction machines and apparatus continuous caster machines Continuous sintering plants Control apparatus for machines, engines and motors control mechanisms for metalworking machines, construction machines and loading-unloading machines Converters converters for steel works Conveyors and auxiliary equipment Copper roll for textile printing Copper sheets Couplings other than for land vehicles Cranes and their parts and accessories Crank shafts Cranks [parts of machines] Crawler-shovel-cranes Crusher Crusher for mines crushing machines for metalworking, construction loading-unloading and chemical processing Crushing rolls and roll housings Cryogenic separation apparatus Cutters cutting machines for metalworking and construction Cyclo drives Cyclo reduction gear (machine) Cylinder boxes DC generators Die-cutting and tapping machines Diggers [machines] Dish washing machines for household purposes Drag line drainage machines for construction Drilling rigs, floating or non-floating Drilling towers Drums [parts of machines] Dynamo brushes Electric circuit board processing machines Electric food blenders [for household purposes] electric machines and apparatus for polishing metal surface Electric wax-polishing machines for household purposes Electric winder Electrical wire and cable manufacturing machines Electronic Motors Ethane recovery apparatus Excavating machines and parts thereof Exhaust manifold for engines Exhausts for motors and engines Extruders Fans and blowing machinery Feeder Feeding apparatus for engine boilers Film laminators Filters finishing machines for metalworking Flanges Flotation machines For chemical industries, sintering plant, sulphuric acid, manufacturing plant, salt manufacturing plant For construction, ladder excavator For metal fabrication, press, shear For mining, mineral dressing plant Forging presses Gas liquefying apparatus Gas separation apparatus gasifiers Gear and pinion coupler and draft gear and spare parts not included in other classes Gear box generators of electricity grinding machines guides for metalworking machines hand-held tools, other than hand-operated Handling equipment for heating furnaces and soaking pits heat exchangers for chemical processing machines Heat exchangers for plants [parts of machines] Helium liquefying apparatus hemming machines High pressure vessels High pressure washers holding devices for metalworking machine tools Hydraulic controller for machines, motors and engines Hydraulic door openers and closers [parts of machines] Hydraulic presses Hydraulic pumps Hydraulic pumps for industrial machines Hydraulic valves Hydrogen recovery apparatus Impeller shaft Incubators Incubators for eggs Infinitely variable gear and other parts and accessories for power engines Inflation film extruding machines Ingot buggies Injection blow moulding machines Ladder excavators Large size agricultural implements Levellers Lifting magnets Link-belt truck cranes Liquid crystal panel etching equipment Liquid crystal panel washing apparatus LNG carburettors Loading-unloading machines and apparatus LPG carburettors Machine coupling and transmission components (except for land vehicles) Machine couplings and belting (except for vehicles) Machine elements [not for land vehicles] Machinery of all kinds, and parts of machinery, except agricultural and horticultural machines and their parts included in class 7 Machines and apparatus for the electronic industry Machines and machine tools Manifold (Exhaust -) for engines Manufacturing plant Mechanical presses MEMS[Micro Electro Mechanical Systems] coating equipment MEMS[Micro Electro Mechanical Systems] etching equipment metal drawing machines Metalworking machine tools metalworking machines Mill Milling machines Mine car Mine haulage apparatus Mineral dressing plant Mixers Motor-driven machines for the chemical industry Motors and engines (except for land vehicles) Motors, electric, other than for land vehicles moulding machines for metalworking moulds (parts of machines) Mufflers for motors and engines Natural gas condensers [parts of machines] Nautical engines Non-electric prime movers, not for land vehicles [other than water mills and wind mills] Nozzles and blades of turbines Oil coolers for aeronautical engines Oil refining machines Other machine or equipment Other metal-processing machines Ozonolysis processing apparatus paring machines for metalworking Parts and accessories for railway locomotives Parts for non-electric prime movers for land vehicles Parts for power engine and related equipment Pipe mills Pistons pneumatic transporters Power couplings presses (machines for chemical processing purposes) presses for metalworking Pressure tank and parts of machines Printing dies Printing machines Pump diaphragms Pumps [parts of machines, engines or motors] Radiators [cooling] for motors and engines rams (machines) Reduction gears other than for land vehicles Road stabilizers robots for metal working Roll and roll housing (parts of machines) Roll and roll-housings rolling mill cylinders rolling mills Rolling mills and their parts and fittings Rolls for Rolling mills Salt manufacturing plant Screen flotator Screens Section rolling mills Semiconductor manufacturing machines and systems Separators sewage pulverizers Sewing machines Shaft couplings or connectors [machine elements not for land vehicles] Shaft units Shafts, axles or spindles [not for land vehicles] Shears Ships' gears and pinions Shock absorbers [machine elements not for land vehicles] Shovel Shuttles [parts of machines] Silencers for motors and engines Silicon dioxide film deposition apparatus Sintering plant Slab coolers slide rests (parts of machines) Springs [parts of machines] Stackers Stack-reclaimers Starters for aeronautical engines Starters for motors and engines Steam accumulators [parts of machines] Steam engine boilers Steel drilling rods, also conical Steel making converters Steel mill cranes Steel sheet processing lines Steering Stern frames and shafts Straighteners Sulphuric acid plants Superchargers Synthetic resin plants Threading machines Tools and instruments and parts thereof for metal fabrication Transferred gears Transmission shafts, other than for land vehicles Transmissions for machines Transmissions, other than for land vehicles trimming machines for metalworking Ultraviolet light irradiation apparatus for water processing Unloaders, loaders, and their related equipment Vacuum cleaners for household purposes Valves [machine elements not for land vehicles] vibrators (machines) for industrial use Washing apparatus Washing machines for household purposes waste compacting machines Waste compacting machines and apparatus Waste crushing machines waste disposers (machines) Water heaters [parts of machines] welding apparatus, gas-operated welding machines, electric Wheel cranes Wire rod mills Woven machines

architectural analysis Architectural consultation architectural design architecture bacteriological research calibration (measuring) chemical analysis computer programming computer software consultancy computer software design computer system analysis computer system design computer virus protection services construction drafting consultancy in the field of computer hardware conversion of data or documents from physical to electronic media creating and maintaining Web sites for others data conversion of computer programs and data (not physical conversion) design of pile driving and other building construction works designing designing of base-isolation and vibration-control devices designing of machines, apparatus, instruments [including their parts] or systems composed of such machines, apparatus and instruments drafting of standard practice instruction for manuals for steeling for others. duplication of computer programs engineering services in the field of chemical plant engineering services in the field of electrical power plant engineering services in the field of energy plants engineering services in the field of floating structures engineering services in the field of liquefied natural gas plants engineering services in the field of offshore steel structures engineering services in the field of polychlorinated biphenyl treatment plant engineering services in the field of receiving and storage plants engineering services in the field of recycling plant engineering services in the field of steel plant engineering services in the field of waste treatment plant exploration of water geological surveys or research hosting computer sites (Web sites) installation of computer software maintenance of computer software material testing mechanical research plant design and providing information on plant design providing information on design of pile driving and other building construction works providing meteorological information providing search engines for the Internet quality control recovery of computer data rental of computer software rental of computers [including central processing units, electronic circuits, magnetic discs and magnetic tapes recorded with computer programs and other peripheral devices] rental of laboratory apparatus and instruments rental of measuring apparatus rental of Web servers research and development for others research in the field of environmental protection research on building construction or city planning surveying technical advice relating to performance, operation of computers, automobiles and other machines that require high levels of personal knowledge, skill or experience of the operators to meet the required accuracy in operating computers, automobiles and other machines technical consultancy service for operation and maintenance of steelmaking plants technical consultancy service for steel making technical consultation in the field of engineering services in the field of chemical plants technical consultation in the field of engineering services in the field of electrical power plants technical consultation in the field of engineering services in the field of energy plants technical consultation in the field of engineering services in the field of floating structures technical consultation in the field of engineering services in the field of liquefied natural gas plants technical consultation in the field of engineering services in the field of offshore steel structures technical consultation in the field of engineering services in the field of polychlorinated biphenyl treatment plants technical consultation in the field of engineering services in the field of receiving and storage plants technical consultation in the field of engineering services in the field of recycling plants technical consultation in the field of engineering services in the field of steel plants technical consultation in the field of engineering services in the field of waste treatment plants testing or research on civil engineering testing or research on electricity testing or research on machines, apparatus and instruments testing or research on prevention of pollution testing, inspection or research of pharmaceuticals, cosmetics or foodstuff testing, inspection or research on agriculture, livestock breeding or fisheries testing, inspection, appraisal or research on metals and their alloys testing, inspection, appraisal or research on steel plates and sheets underwater exploration updating of computer software urban planning

Advertisement columns of metal Alloy rolls Alloy steel for construction and steel brackets Alloys for battery electrodes Alloys of common metal Alloys of nonferrous metals Alloys, heat-resistant, acid-resistant and corrosion-resistant aluminium aluminium foil Aluminium pipes aluminium wire Aluminum and its alloys Anchor plates Anchors Angle irons Angle valves [of metal, not machine elements] Antenna wire Anti-friction metal Anti-friction metal for iron alloys Anvils Armour plate Artificial fish reefs of metal Automatic control valves [of metal, not machine elements] Ball valves [of metal, not machine elements] balls of steel Bands of metal for tying-up purposes Bars Bars for metal railings Beacons of metal (non luminous) Bells Bells for animals Billets Bindings of metal Bins of metal Blooms [metallurgy] Bolts of metal Booms Bottles [metal containers] for compressed gas or liquid air boxes of common metal brackets of metal for building Branching pipes of metal Brass and its alloys Brass Sheet, Strip, Bar brass, unwrought or semi-wrought brazing alloys Bronzes [works of art] building boards of metal Building materials of metal Building materials, pipes and tubes (none being boiler tubes or parts or machines), all included in Class 6 Building panels of metal buildings of metal Buildings, transportable, of metal Buoys Butterfly valves [of metal, not machine elements] Cable joints of metal, non-electric Cables and wires (non-electric) Cans of metal Casings of metal for oilwells Cast iron vessels (not included in other Classes) cast iron, unwrought or semi-wrought cast steel Casters of metal Castings Castings, foils, powder, and rolled, drawn or extruded semi-finished articles of titanium or its alloys Ceilings of metal Chains (except driving chains for vehicles) Chains for dogs Chimneys of metal Chromium Clad steel plates and sheets Cladding of metal for construction and building Clips of metal for cables and pipes Closures of metal for containers Cocks [of metal, not machine elements] Coils cold-rolled steel sheets and coils Collars of metal for fastening pipes Collecting pipes of metal Columns of metal Common metal gauges for vehicles Common metal personal gauges Common metal works of art Common metals and their alloys common metals, unwrought or semi-wrought Common metals, unwrought or semi-wrought, not included in other classes Containers of metal Containers of metal for compressed gas or liquid air Containers of metal for liquid fuel containers of metal for storage Containers of metal for storing acids Containers of metal for transport Copper and its alloys Copper Sheet, Strip, Bar copper, unwrought or semi-wrought Cotter pins Coupling of metals crash barriers of metal for roads Drain pipes of metal Duckboards of metal Ductile cast iron rolls Ducts and pipes of metal for central heating installations Elbows of metal for pipes electrical steel sheets Extrusion steels Fish plates [rails] fittings of metal for building Fittings of metal for furniture Fittings of metal for windows Fittings of pipework of metal Flanges of metal flanges of metal (collars) Flashing of metal, for building Floor tiles of metal Forgings Foundry and anvils made of steel foundry moulds of metal Frame work for prefabrication Frames of metal for building framework of metal for building Free cutting steel plates and sheets Full metallic buildings galvanized sheets and coils. Gas cylinders Gaskets of metal Girders of metal gold solder Gratings of metal Gravestones of metal Grilles of metal Guard rails for city street Guard rails of metal Gutter pipes of metal Gutters of metal Handcuffs Hardware and ironmongers articles Hardware of metal Hardware tools heavy plate Hollow steel bars Hoop iron Hoop steel Horseshoes hot-rolled steel sheets and coils indium Industrial packaging containers of metal ingots of common metal Ingots of metals, not of precious metals Iron iron ores Iron sheets Iron slabs Iron strip iron wire iron, unwrought or semi-wrought Ironmongery Ironmongery, small items of metal hardware Irons and steels joists of metal Junctions of metal for pipes Keys Lead lead, unwrought or semi-wrought linings of metal (building) Loading and unloading pallets of metal Locks Locks of metal, other than electric Locksmith's works Lubricating nipples Machine belt fasteners of metal Magnesium manhole covers of metal Manifold manifolds of metal for pipelines materials of metal for funicular railway permanent ways Materials of metal for railway tracks Metal bottle for air compression and liquid compression valves Metal conduit, for cables and pipes Metal cylinders for compressed gas Metal flanges Metal foundation plate for buildings Metal frames for packing, for purposes of transport and storage of pipes Metal joinery fittings Metal junctions for pipes Metal latches of gates Metal lids and caps [for industrial packaging containers] Metal materials for building construction or for structure Metal materials for skeletons or frames for building or construction Metal moulds for forming cement products not being parts of machines Metal pipes and tubes Metal pipes and tubes for boiler, semi-wrought Metal pulleys Metal pulleys, springs and valves [not including machine elements] Metal sheets for building use Metal stoppers [for industrial packaging containers] Metal tombs Metal wires Metal wires rods Metallic alloy pipes Metallic and enamelled sheets for coverings Metallic barrels Metallic bins Metallic caps for containers Metallic capsules for compressed gas Metallic hose for vacuum cleaners Metallic key carriers Metallic non-luminous nor mechanical road signals Metallic pipes Metallic swimming pools Metallic tubes and pipes of all kinds, including gas pipes and casings for oil wells Metallic winding keys Metals and semi manufactures thereof not belonging to any other class Metals and their alloys metals in powder form Meteorological instruments of metal Mineral Miscellaneous hardware of metal Miscellaneous pilings of metal Miscellaneous steel pipes Molybdenum Mooring bollards of metal Moulds Nails and screw nickel niobium Non-electric cables and wires of common metal Nonferrous metals and their alloys Nozzles of metal Nuts [of metal] Nuts and screws made of metal Oil Pipe Ores Ores of common metal Ores of metal, except sodium, potassium and calcium, not included in fuel Other products made of non-steel and non-precious metal extrusion materials Packaging containers of metal Partitions for office use Partitions of metals Pegs of metal Penstock pipes of metal Petroleum and casing pipe Pilings of metal pillars of metal for buildings Pipe fittings Pipe joints of metal pipe muffs of metal Pipelines of metal Pipes and tubes (not being parts of machines and/or of boilers) Pipes and tubes of metal Pipes and tubes of metal and their alloys, not being parts of machines or parts of cooling, warming and distilling installations pipes of metal Pipes of metal, for central heating installations Pipework of metal Pipework of metal, not included in metal materials for building or construction Pitons of metal [mountaineering equipment] Plates Plugs of metal poles of metal posts of metal Posts of metal for electric lines Poultry house of metal Prebuilt metallic houses and other buildings Prebuilt metallic sections and panels therefor Prefabricated building assembly kits of metal Prefabricated building assembly kits of metal, for skeletons or frames props of metal Props of metal for bridges railroad ties of metal Rails and other metallic materials for railway tracks rails of metal railway material of metal Railway points railway sleepers of metal Railway switches Rare-earth alloys for magnets Refractory construction materials of metal reinforcing materials of metal for building Reinforcing materials of metal for machine belts Reinforcing materials of metal for pipes Reinforcing materials, of metal, for concrete Reservoirs of metal Road signs of metal (not luminous nor mechanical) rods of metal for brazing rods of metal for welding Rolled and cast building materials Rolled steels Roof coverings of metal Roof flashing of metal Roofing of metal Ropes of metal Safety boxes Safety cashboxes Sand molds of metal Screws of metal Sealing caps of metal Second products of Iron and steel Semi-finished steel Semi-products of steel Shaped objects made of steel (not included in other Classes) Shapes Sheet Sheet bars Sheet irons sheet piles of metal Sheet pilings sheets and plates of metal Sheets and stripes Shoe nails Shuttering of metal for concrete Signaling panels, non-luminous and non-mechanical, of metal Signboards of metal silver plated tin alloy silver solder Silver weld Slabs sleeves (metal hardware) soldering wire of metal Springs [metal hardware] Springs and valves (not being parts of machines) Springs for furniture [metal hardware] Spurs stainless-steel coils Steel Steel (rolled) for rolling operations steel alloys Steel and articles made therefrom included in Class 6 Steel angles Steel balls, not included in other classes steel bars Steel blooms Steel buildings steel cables Steel frames Steel framework for pre-fabrication Steel joists for use in building steel material Steel or metallic water and gas pipe Steel pallets Steel panels for flooring steel pipes Steel pipes and tubes for boiler, semi-wrought Steel pipes for air-bag parts Steel pipes for boilers Steel pipes for boilers [semi-finished products] Steel plates Steel poles Steel poles and tubes for air-bag components Steel rails steel shapes steel sheets steel strands steel strip Steel tapered poles Steel tire Steel tubes Steel tubes Steel tubes for boilers steel wire steel, unwrought or semi-wrought Steels for automobiles Steels for bearings Steels for boilers Steels for machine structural use Steels for pressure vessels Steels for ship structural use Steels, heat-resistant, acid-resistant and corrosion-resistant Stirrups of metals Stopper-shaped or lid-shaped metallic shield for protecting screw parts of pipes strap-hinges of metal Straps of metal for handling loads Strips Tanks of metal tantalum (metal) Thread of metal for tying-up purposes tin tin free steel sheets and coils tinfoil tinplate tinplate packings Tinwork and cookware included in this class titanium Titanium alloys Titanium bars titanium iron tombac Tool boxes of metal, empty Transportable buildings of metal Traps for wild animals Tree protectors of metal trellis of metal Tube and Pipe of Steel tubes of metal tungsten Unwrought and partially wrought common metals and alloys Valves of metal, other than parts of machines vanadium Vice benches of metal Vices of metal Wall cladding of metal for building Wall linings of metal for building Wall plugs of metal Water-pipes of metal Wild animals traps Wire nets and gauzes wire of common metal wire of common metal alloys, except fuse wire wire of metal for welding wire rope Works of art of common metal Wrapping or binding bands of metal Zinc and its alloys Zinc-coated steel sheets. zirconium

AC motors or DC motors for land vehicles [not including "their parts"] Adhesive rubber patches for repairing tubes or tires Aerial conveyors Aeronautical apparatus Aeroplanes Air bags [safety devices for automobiles] Air-conditioning installations for air planes Aircraft and their parts and fittings Air-cushion vehicles All for rolling stock All goods, vehicles, ships and other apparatus and appliances and accessories thereof Anti-theft alarms for vehicles Anti-theft devices for vehicles Apparatus of locomotion by land, air or water and spare parts thereof not included in other classes Automobile crankshafts Automobiles and their parts and fittings Axle boxes for locomotives Axle journals Axles Axles (rolling stock parts and accessories) Axles for land vehicle wheels Axles for vehicles Baby carriages Bicycle trailers [Riyakah] Bicycles and their parts and fittings Bodies [of railway cars] Bogie trucks (rolling stock parts and accessories) Bogies Bogies for railway cars Brake linings for vehicles Brake segments for vehicles Brake shoes for vehicles Brakes [for land vehicles] Brakes [machine elements not for land vehicles] Brakes for vehicles Buffers for railway rolling stock Cable cars Camshafts Car truck coupler Car trucks Carriages and parts and accessories thereof Carts Chassis [of railway cars] Command gear units (rolling stock parts and accessories) Connecting rods for land vehicles, other than parts of motors and engines Coupler and draft gear Coupler for automobiles Couplers Coupling and draft gears Coupling chains for rolling stock Couplings for land vehicles Crankshafts Current collecting equipment [for railway cars] Draft gears all included in Class 12 being parts and fittings of rolling stock Driveshafts Driving gear units Driving gears Electric leather belts for vehicles Engagement apparatus (rolling stock parts and accessories) Flanges for railway wheel tires [tyres] Fork lift trucks Gear and pinion coupler and draft gear Gear boxes for land vehicles Gear units Gearing for land vehicles Gears and pinion Hand cars Handstraps [of railway cars] Heat exchangers for land vehicles Horse drawn carriages Hydraulic circuits for vehicles Inner tubes for tires Leaf-springs Leather belts for transport Machine elements for land vehicles Machines and appliances Metal wheels for rolling stock and steel tyres for use therewith Mine trolleys (carriages) Motor coaches Motorcycles Non-electric prime movers for land vehicles [not including "their parts"] Parachutes Parts and accessories for railway freight and passenger cars - namely, railway trucks, wheels, axles, and wheel-axle units Parts and fittings for automobiles Pedicabs Piston rings Power conversion elements Propeller shafts Puller cars for mining Pusher cars for mining Railway couplings Railway freight cars Railway rolling stock and their parts and fittings Reduction gears for land vehicles Relaxation control apparatus and instruments for the different levels between the rail cars and the station platforms Rickshaws Road vehicles and parts thereof Rockets Rolling stock and parts and fittings threfor Rolling stock for railways Ropeways for cargo or freight handling Rotative power transmission belts connecting engines and radiator cooling fans [for land vehicles] Rotor discs Seat covers for vehicles Shafts, axles or spindles, Bearings, Shaft couplings or connectors, Power transmissions and gearings [for land vehicles] Ships Ships' hulls and parts thereof included in Class 12 Ships' steering gears Shock absorbers and shock absorbing springs [for land vehicles] Shock absorbers for railwaycars and motorcars Shock absorbing springs for vehicles Sleighs and sleds [Vehicles] Solid rolled wheels (rolling stock parts and accessories) Space vehicles Spindle ensembles with rotors Springs Springs for rolling stocks Springs for vehicles Stabilizers Steel bands Steel rims for rolling stock wheels Steel tires (rolling stock parts and accessories) Stern frames and shafts Suspension shock absorbers for vehicles Suspension springs Suspension systems and accessories there fore Tires of automobiles (all aforesaid goods for vehicles) Traction engines Traction or hitching apparatus (rolling stock parts and accessories) Tractors Train and parts and fittings therefore Transistors [electronic] Transmission shafts for land vehicles Trucks Two-wheeled motor vehicles and their parts and fittings Undercarriages [of railway cars] Undercarriages for vehicles Unloading tipplers [for tilting railway freight cars] Valve shafts Vehicle couplers Vehicle suspension springs Vehicle wheels Vehicles, apparatus for locomotion by land, water or air, parts and accessories thereof Vehicles, ships and other carrying machines and appliance and parts thereof Vehicles, structural and component parts thereof Vessels and their parts and fittings Water bikes [personal watercrafts] Wheel centers (rolling stock parts and accessories) Wheel rims Wheel-axle units Wheelbarrows Wheelchairs Wheels Wheels [of railway cars]

air conditioning apparatus installation and repair aircraft maintenance or repair boiler cleaning and repair bridge construction Building construction building construction supervision building insulating building reinforcing building sealing burner maintenance and repair carpentry civil engineering work consultancy construction construction consultancy construction information construction of airports construction of aquatic facilities construction of artificial islands construction of base-isolation and vibration-control device for building construction of coastal structures construction of natural gas drilling platforms construction of natural oil drilling platforms construction of offshore structures construction of stadiums construction of storage tanks construction of telecommunication towers construction of tunnels consultancy of computer hardware damp-proofing (building) demolition of buildings dredging drilling of wells earthworks or concrete construction electric appliance installation electrical works factory construction foundation pile construction furnace installation and repair general building construction works general civil engineering works glazing [glasswork] harbour construction installation of heat exchangers, vaporizer and condenser installation, maintenance and repair in the field of chemical plants installation, maintenance and repair in the field of electrical power plants installation, maintenance and repair in the field of energy plants installation, maintenance and repair in the field of liquefied natural gas plants installation, maintenance and repair in the field of polychlorinated biphenyl treatment plant installation, maintenance and repair in the field of recycling plants installation, maintenance and repair in the field of steel plants installation, maintenance and repair in the field of waste treatment plants installation, maintenance and repair of computer hardware installation, repair or maintenance of machinery joinery machinery installation maintenance and inspection of aircraft air-conditioning system maintenance and inspection of aircraft part maintenance of boilers maintenance of pump masonry operation, check or maintenance of building equipment operation, check, repair or maintenance of plants and relevant consultancy painting pier construction pile construction pipeline construction and maintenance plastering plumbing pump repair. rental of construction machines and apparatus rental of mining machines and apparatus. repair or maintenance of civil engineering machines and apparatus repair or maintenance of air-conditioning apparatus [for industrial purposes] repair or maintenance of aircraft tires repair or maintenance of automobiles repair or maintenance of chemical plants repair or maintenance of civil engineering machines and apparatus repair or maintenance of computers [including central processing units, electronic circuit, magnetic disc and magnetic tapes recorded with computer programs and other peripheral devices] repair or maintenance of condenser repair or maintenance of construction machines and apparatus repair or maintenance of electric motors repair or maintenance of electronic machines and apparatus repair or maintenance of freezing machines and apparatus repair or maintenance of industrial furnaces repair or maintenance of manufacturing equipment of liquid crystal panel repair or maintenance of MEMS (microelectromechanical system) manufacturing equipment repair or maintenance of nuclear power plants repair or maintenance of office machines and apparatus repair or maintenance of ozonator repair or maintenance of power distribution or control machines and apparatus repair or maintenance of power generators repair or maintenance of railway rolling stock repair or maintenance of two-wheeled motor vehicles repair or maintenance of waste compacting machines and apparatus repair or maintenance of waste crushing machines and apparatus repair or maintenance of water treatment equipment repair, cleaning or maintenance of protective equipment for protecting a screw part of pipe residential and commercial building construction riveting road construction road paving roofing services scaffolding, upholstering sheet metal work steel structure construction supervision of works concerning construction telecommunication wiring telephone installation and repair tile laying, bricklaying or block laying underwater construction underwater repair vermin exterminating [other than for agriculture, forestry or horticulture] warehouse construction water network construction