Air-intake tubes and filters for after-market installation of automotive engines; Air filters for pneumatic controls being part of machines; Bearings, as parts of machines; Bushings for use as parts of machines; Dust removing installations for cleaning purposes; Electric motors, and their parts, not for land vehicles; Machine couplings and transmissions, except for land vehicles; Machine elements not for land vehicles, namely, shock prevention devices for machines; Mechanical engine parts for land vehicles; Mechanical seals; Parts for compressed-air tools, namely, brakes, filters, hoses, pipes, couplings valves, switches, compressors, clamping tools and injectors; Power-operated lawn and garden tools, namely, cultivators; Power tool parts, namely, electric screwdriver parts in the nature of chucks, torque control rings, electric motors, trigger assemblies; Silencers for motors and engines; Oil, gas, air filters for motors and engines