7 Vacuum pumps and vacuum pump stands consisting of vacuum pumps; drives and shaft bearings for vacuum pumps; fittings for vacuum pumps and vacuum pump stands, namely, oil separators, condensate separators, dust separators, radiators for motors and engines, fuel filters, oil filters, air-cooled steam condensers, connecting rods for machines, motors and engines, and pump control valves; valves being parts of machines; vacuum engineering installations, primarily composed of vacuum pumps, and fittings for vacuum pumps in the nature of oil separators, condensate separators, dust separators, radiators for motors and engines, fuel filters, oil filters, air-cooled steam condensers, valves as machine components; vacuum-tight, mechanical and electrical ducted fans for motors and engines; rotary bushings for use as parts of machines; rotary and sliding bushings for use as parts of machines; sliding bushings being parts for vacuum engineering installation machines; automatic inlet control valves for reciprocating air compressors; steam/oil separators; filters being parts of vacuum machines or engines, dust separators