Non-electric prime movers not for land vehicles, other than water mills and wind mills, namely, jet engines, rocket engines, turbines, compressed air engines and integral parts therefor, namely, nozzles, spark plugs and battery contacts, internal combustion engines, gasoline engines and fuel injection devices for internal combustion engines, diesel engines, internal combustion engines for power generation; Parts of non-electric prime movers, other than water mills and wind mills, namely, parts for internal combustion engines not for land vehicles and except for water mills and wind mills consisting of pistons and heads, parts for jet engines not for land vehicles and except for water mills and wind mills, namely, pistons and heads, parts for rocket engines not for land vehicles and except for water mills and wind mills, namely, pistons and heads, cylinder heads, cylinder blocks, valve controls, Piston rings for internal combustion engines, oil control rings with coil expanders for internal combustion engines, structural and replacement parts therefor; Parts of non-electric prime movers for land vehicles, namely, glow plugs and hydraulic linear actuators, hydraulic valve actuators, linear actuators, pneumatic linear actuators, pneumatic valve actuators; parts of internal combustion engines, namely, piston rings, cylinders and cylinder heads; Water mills; Windmills; Machine elements, not for land vehicles, namely, hydraulic pumps, pistons, valves, hydraulic cylinders