Shaft couplings for machines; filters for cleaning cooling air, for engines; valves being parts of machines; connecting rods for machines, motors and engines; engine injectors; machine parts, namely, joints and joint parts for connecting sliding strips, plates and guides; cylinder heads for engines; starters for motors and engines; bearings, as parts of machines; driving motors, other than for land vehicles; jet engines, other than for land vehicles; pistons for engines; speed governors for machines, engines and motors; back pressure valves as parts of machines; springs being parts of machines; taps being parts of machines, engines or motors; fans for motors and engines; couplings for machines; compressed air machines; anti-friction bearings for machines; gear boxes, other than for land vehicles; motors, other than for land vehicles; fan belts for motors and engines; gears, other than for land vehicles; cylinders for motors and engines; reduction gears other than for land vehicles, exhausts for motors and engines; motors other than for land vehicles; hydraulic engines and motors; cooling radiators for motors and engines; hydraulic controls for machines, motors and engines; pneumatic controls for machines, motors and engines; crankcases for machines, motors and engines; hydraulic door openers; mufflers for motors and engines; pneumatic door openers; door closers, electric; door openers, electric; electric window openers; window closers, electric; hydraulic window openers; window closers, hydraulic; pneumatic window openers; window closers, pneumatic; hydraulic door closers; pneumatic door closers; engine mounts, other than for land vehicles