6 Compressed air ducts, compressed air containers and safety valves, of metal; hose fittings of metal, namely hose couplings, hose clamps, hose nozzles.
7 Compressors, in particular screw-type compressors, oil-free screw-type compressors, screw-type compressors with oil-injection cooling, piston compressors, oil-free piston compressors, oiled piston compressors; compressed air ducts and compressed air containers as parts for machines; integrated compressed air installations, in particular with compressors, motors and radiators; compressed air apparatus, compressed air machines, compressed air tools; compressed air fittings for machines, namely ball valves, air stop valves, quick-action stop valves, condensate drain cocks, return valves, safety valves, control flanges, automatic condensate drainage devices, oil and water separators, pressure reducers, high-pressure hoses for elastic connections, compressed air hoses, single-hand couplings, basic load alternating circuits; paint spraying apparatus and devices, jacks (machines), hoists (machines), lifting platforms and parts therefor; pumps, included in class 7; car washing pumps, mechanical lubricating apparatus, automatic machine tools; safety valves as parts of machines.
9 Manometers, elapsed time indicators, pressure switches, safety valves, tyre testing apparatus.
11 Air filters for compressors, compressed air filters, air dryers, compressed air drying installations.
17 Compressed air ducts, not of metal.
20 Compressed air ducts, compressed air containers and safety valves, not of metal; hose fittings not of metal, namely hose couplings, hose clamps, hose nozzles.
37 Maintenance of compressed air installations.
42 Planning and engineering of compressed air installations.