6 Rolled, soldered and cast building elements of common metal; semi-worked common metals; hoses, pipelines, couplings for pipes and hoses and hose clips of metal; containers for liquids and gases of metal.
7 Pumps, compressors, blowing machines and fans, transportable pump units for liquids and gases, mainly consisting of pumps, motors and a stationary or moveable base frame; housing, shafts, bearings and wheels of common metal, plastic or ceramic, shaft couplings, all being machine parts; motors, electric, other than for land vehicles; liquid separators and dust separators, filter apparatus; heat exchangers, valves, return, metering and pressure valves, cut-off switches, protective switches and contactors being parts of machines; vibration protection and sound insulation devices, namely vibrating machine mountings, sound absorbing devices.
9 Fire-extinguishing pumps; measuring, signalling, checking (supervision), and control apparatus and instruments; commutators, relays and fuses for electric, pneumatic and hydraulic control mechanisms or driving gears; control panels.
11 Installations for supplying liquids, mainly consisting of pumps, pipework, connection pieces, containers, measuring and control apparatus; fans being parts of ventilation installations; heat exchangers, valves, return, metering and pressure valves, cut-off switches, protective switches and contactors for liquid and gas pipes.
17 Pipelines, couplings for pipes and hoses and hose clips of plastic; hoses of plastic or textile; packing and stopping material.
20 Containers for liquids and gases of plastic.