7 Air suction machines; bending machines; compressed air machines; compressed air pumps; compressors for machines; air condensing installations for chemical processing; hydraulic, pneumatic and thermostatic control mechanisms for metalworking machines, construction machines and loading-unloading machines; crushing machines for metalworking, construction loading-unloading and chemical processing; cutting machines for metalworking and construction; electric welding apparatus, namely, electric welding machines; drainage machines for construction, namely, oil drain pumps, earth moving machines and earth augers; apparatus for dressing for metalworking, namely, planning machines; electric arc cutting apparatus; electric arc welding apparatus; finishing machines for metalworking; gasifiers; AC generators of electricity; DC generators of electricity; galvanizing apparatus, namely, galvanizing machines; grinding machines; guides for metalworking machines; hand-held tools, other than hand-operated, namely, power-operated hand-held tools, namely, power drills, buffers and grinders; heat exchangers for chemical processing machines; hemming machines; holding devices for metalworking machine tools, namely, metalworking machine tool holders; apparatus for metalworking machining, namely, machining centers for metalworking machining; metal drawing machines; metalworking machines, namely, bending machines, milling machines, metal forming machines, metal sawing machines and continuous metal casting machines; metal surface galvanizing apparatus; moulding machines for metalworking; forging moulds; paring machines for metalworking; pneumatic transporters; electric machines and apparatus for polishing metal surface; presses for metalworking; presses, namely, machines for chemical processing purposes; rammers; rolling mill cylinders; rolling mills; sewage pulverizers; slide rests being parts of machines; trimming machines for metalworking; vibrators machines for industrial use; waste compacting machines; industrial waste disposers machines; gas-operated welding machines; welding machines, electric; industrial robots for metal working; continuous casting machines; apparatus for the treatment of metal giving a pickling effect on the surface; apparatus for tin-plating on the surface of metal; annealing machines for metalworking; electromechanical machines for chemical industry, namely, sintering machines and calcining machines; sorting machines for industry; pumps, namely, electric pumps, silt pumps and hydraulic pumps; pneumatic machines, namely, pneumatic hammers, pneumatic conveyors and pneumatic pumps; hydraulic machines and apparatus, namely, hydraulic jacks, hydraulic excavators and hydraulic conveyors; apparatus for giving a pickling treatment on the surface of metal