Engines, other than for land vehicles; compressed air engines; motors, other than for land vehicles; mechanical engine parts for land vehicles; superchargers; injectors for engines; joints [parts of engines]; pistons for engines; piston rings; exhaust manifold for engines; anti-pollution devices for motors and engines; cylinders for motors and engines; cylinders for machines; cylinder heads for engines; cylinder heads for machines; cylinder head gaskets for machines; fans for motors and engines; radiators [cooling] for motors and engines; mufflers for motors and engines; silencers for motors and engines; exhaust silencers for engines; exhausts for motors and engines; expansion tanks [parts of machines]; oil filters for motors and engines; filters for motors, engines and machines; filters for cleaning cooling air, for engines; turbochargers for machines; air turbines [not for land vehicles]; pneumatic controls for motors and engines; oil coolers for engines; connecting rods for machines, motors and engines; blowing machines for the compression, exhaustion and transport of gases; plunger pistons; pumps [parts of machines, engines or motors]; compressed air pumps; lubricating pumps; compressors [machines]; compressors as parts of machines, motors and engines; compressed air machines; compressors for refrigerators; reciprocating compressors; compressors as parts of machines, motors and engines; air compressors; rotary compressors; compressors for recovering and recycling refrigerant gases; reciprocating compressors; pump diaphragms; pistons for compressors; pump impellers; roller bearings; ball-bearings; anti-friction bearings for machines; self-oiling bearings; bearings as parts of machines; roller bearings for machines; bearing housings for machines; bushings for use as parts of machines; bearing brackets for machines; bearing inserts for machines; cranks [parts of machines]; crank shafts; transmission shafts, other than for land vehicles; shafts for pumps; shaft couplings as parts of machines; grease boxes [parts of machines]; journals [parts of machines]; journal boxes [parts of machines]; hangers [parts of machines]; stuffing boxes [parts of machines]; axles for machines; anti-friction pads for machines; gears for machines; machine wheelwork; clutches other than for land vehicles; torque converters other than for land vehicles; freewheels other than for land vehicles; machine fly-wheels; pulleys being parts of machines; adhesive bands for pulleys; belts for machines; driving chains other than for land vehicles; transmissions, other than for land vehicles; linear actuators; pistons for machines; cams being parts of machines; fluid couplings being parts of machines; shock absorbers for machines; springs being parts of machines; pressure regulators being parts of machines; pressure reducers as parts of machines; clack valves [parts of machines]; valves as machine components; pressure valves [parts of machines]; automatic inlet control valves for reciprocating air compressors; ball valves being parts of machines; unloading check valves for the outlets of air compressors; butterfly valves being parts of machines; angle valves being parts of machines; thermostatic control valves for machines; drain cocks; pressure switches as parts of machines; filters [parts of machines or engines]; carburetors; de-aerators for feedwater; steam/oil separators; hydraulic turbines; wind turbines; pistons for cylinders; piston segments; cylinders for machines; stators being parts of machines; crankcases for machines, motors and engines; grease rings [parts of machines]; pistons [parts of machines or engines]; cam shafts; crank shafts; machine coupling and transmission components, except for land vehicles, and parts therefor; compressed air machine components, namely, cylinders, valves and air grips