Chemical processing machines and apparatus; non-electric prime movers, not for land vehicles, other than water mills and windmills; parts of non-electric prime movers, other than water mills and wind mills; feed water heaters for nonelectric prime movers and engines; internal combustion engines, not for land vehicles; silencers, not for land vehicles; Diesel engines, not for land vehicles; turbines, not for land vehicles, other than water mills and wind mills; gas turbines, not for land vehicles; engines, other than for land vehicles; superchargers; injectors for engines; sealing joints being parts of engines; cylinder heads for engines; joints being parts of engines; exhaust manifold for engines; pistons for engines; silencers for motors and engines; cylinders for motors and engines; igniting devices for internal combustion engines; cooling radiators for motors and engines; radiators for cooling for motors and engines; catalytic converters; propulsion mechanisms, other than for land vehicles; sparking plugs for internal combustion engines; pneumatic or hydraulic machines and instruments; pumps, not for specified purposes; vacuum pumps, not for specified purposes; blowers, not for specified purposes; compressors, not for specified purposes; expansion tanks being parts of machines; shafts, axles or spindles, machine elements other than land vehicles; bearings, machine elements not for land vehicles; shafts, couplings or connectors, machine elements not for land vehicles; cranks being parts of machines; crank shafts; bearings being parts of machines; couplings, other than for land vehicles; power transmissions and gearing, machine elements not for land vehicles; reversing gears, machine elements not for land vehicles; clutch mechanisms, machine elements other than for land vehicles; reduction gears, machine elements not for land vehicles; toothed wheels or gears, machine elements not for land vehicles; speed change gears, machine elements not for land vehicles; machine flywheels; gear boxes, other than for land vehicles; gears, other than for land vehicles; clutches, other than for land vehicles; reduction gears, other than for land vehicles; transmissions for machines; valves being machine elements not for land vehicles; angle valves being machine elements not for land vehicles; ball valves being machine elements not for land vehicles; cocks being machine elements not for land vehicles; automatic control valves being machine elements not for land vehicles; butterfly valves being machine elements not for land vehicles; pressure regulators being parts of machines; pressure valves being parts of machines; non-return valve being parts of machines; pressure reducers being parts of machines; starters for motors and engines; AC motors and DC motors, not including those for land vehicles but including parts for any AC motors and DC motors; AC generators being alternators; DC generators; cartridges for filtering machines; filtering machines; filters being parts of machines or engines; air condensers; electric heaters for engines; cylinders for machines; pistons for cylinders; piston rings; crankcases for machines, motors and engines; grease rings being parts of machines; speed governors for machines, engines and motors; connecting rods for machines, motors and engines; pistons being parts of machines or engines