7 Exhaust systems (machines) consisting of thermally and/or motor controlled exhaust dampers, of draught limiting devices, of exhaust silencers, of metal exhaust pipes and combustion air dampers, of combustion air supply devices and chimney venting devices; catalytic converters; separators; brushes [parts of machines]; steam/oil separators; steam condensers [parts of machines]; pressure regulators [parts of machines]; pressure valves [parts of machines]; electricity generators; finishing machines; blowing machines for the compression, exhaustion and transport of gases; expansion tanks [parts of machines]; blowing engines; compressors [machines]; compressors for refrigerators; condensing installations; radiators [cooling] for motors and engines; air-cooled condensers; air condensers; aerocondensers; mechanical tension limiting devices; machines for machining metals; machines for the spraying, blowing and molding process; machines for the installation of chimneys; machines for shaping; machines for scouring; machines for burnishing; metalworking machines; motors, other than for land vehicles; regulators [parts of machines]; air suction machines; silencers for motors and engines (except for land vehicles); valves [parts of machines]; current generators; thermally and/or motor-controlled exhaust gas flaps (machine parts); superheaters; valves [parts of machines]; heat exchangers [parts of machines]; water heaters [parts of machines]; alternators; machine tools