machine and machine tool parts, namely, chains that do not require lubrication; cam drives for internal combustion engines; power transmissions and parts thereof; gears and gear boxes and parts thereof; driving chains; conveying chains; chain clutches; chain couplings; chain racks and pinions; counter weight chains and pinions in combination; speed change drives; speed change gears; chain cases and splash guards; chain tension adjusters; chain guides; chain wheel cutters; chain grinding machi...