Shaft couplings for machines; Ball bearings for use in machines other than land vehicles, namely, electric motors not for land vehicles, gearboxes not for land vehicles, conveyors being machines, packaging machines, robots, food processing machines, metalworking machines, and agricultural machines; Belts for machines; Machine parts, namely, bearings; Pulleys being parts of machines; Roller bearings for machines; Roller chains being parts of machines; Driving chains other than for land vehicle...