6 Unwrought or semi-wrought iron; unwrought or semi-wrought iron alloys; unwrought or semi-wrought steel; steel in the form of sheet, pipe, tube, plate, bar, billet, bloom, slab and rail form; scraps of steels and steel alloys; non-ferrous common metals and their alloys, in unwrought or semi-wrought form; building materials of metal; nails, wedges, washers, nuts, screws, plugs, bolts, and rivets, all made of metal; prefabricated buildings of metal; tanks of metal; floating metallic lids for gas or liquid gas tanks; storage containers of metal; tin cans; collapsible metal tubes; metal containers for compressed gas; drum cans; loading pallets of metal; cargo handling turn-tables of metal; artificial fish-gathering rocks of metal; junctions of metal for pipes; flanges of metal; wire rope.
7 Metalworking machines and tools; gas-operated welding machines, oxy-acetylene welding and cutting machines and electric welding machines; molding machines and molds; mine-working machines; machines for use in construction; cranes, conveyors, winches and hoists; lifting and conveying machines and apparatus for use in automatic storage of goods and cargoes; machines and apparatus for use in chemical plant, machines and equipment for manufacturing semi-conductors; pumps, vacuum pumps, blowers, and compressors, all being machines or machine parts; car-parking machines and mechanically operated car-parking installations; painting machines; waste crushing, shredding and compacting machines and apparatus; shaft couplings; transmissions for machines.
9 Measuring apparatus and instruments; testing apparatus and instruments, not for medical use; electric apparatus and installations for the automatic control of temperature and/or combustion in industrial operation; electro-magnetic, electric and magnetic measuring apparatus and instruments; electronic machines, apparatus and instruments; ultrasonic depth sounders; magnetic object detectors; ultrasonic flaw detectors; computers and computer peripherals; computer programs; electronic circuit boards; integrated circuits; electric arc welding machines and apparatus; electric arc cutting machines and apparatus; electric welding apparatus.
11 Furnaces for industrial use; boilers other than parts of machines; drying and desiccating apparatus and installations; heat regenerators; steam generating installations; evaporators; distillation apparatus; heat exchangers; air conditioning apparatus and installations; water purifying apparatus and installations; water distribution installations; water drainage installations; sewage disposal and treatment apparatus and installations; taps and valves for water pipes; level controlling valves for use in tanks; pipeline cocks; waste water purification tanks; sewage disposal tanks; garbage incinerators; apparatus, installations and/or units for the destruction, incineration and/or recycling of wastes, slurry, garbage and trash; apparatus, installation and/or units for removing bubbles for water purification; automatic control apparatus for the operation of electric arc furnaces in ironworks; fermentation apparatus for manufacturing fertilizers from garbage, organic wastes, urine, slurry and sludge.
37 Building construction, maintenance and repair; machinery installation; drilling of wells; pipeline construction, repair and maintenance; construction, repair and maintenance of industrial plant and factories; installation, repair and maintenance of furnaces for industrial use; installation, repair and maintenance of electric sidewalks; construction information; building construction supervision; repair and maintenance of machines and apparatus for use in the chemical plants, car-parking machines and installations, metalworking machines and tools, mine-working machines, water purifying apparatus and installations, water drainage installations, measuring apparatus and instruments, air conditioning apparatus and installations, burners, boilers, pumps, freezers, storage tanks, telecommunication machines and apparatus, electronic machines and apparatus, electricity distribution or control machines and instruments, painting machines, machines for use in construction, machines and apparatus for crushing, shredding and compacting of wastes, machines and equipment for manufacturing semi-conductors and integrated circuits, plastics processing machines, machines and instruments for use in amusement parks, motors, installations and apparatus for separating and treating trash and industrial wastes, and bath tubs; chimney sweeping; cleaning of building exterior surfaces; window cleaning; carpet and rug cleaning; floor polishing; septic tank cleaning; storage tank cleaning.