7 Non-electric prime movers, not for land vehicles other than "water mills" and "wind mills," namely motors and engines; parts of non-electric prime movers for land vehicles, namely, camshafts, cylinders, cylinder pistons, alternators, belts, carburetors, distributor rotors, distributor caps, coils, turbochargers, and heat exchangers; machine elements not for land vehicles, namely, block brakes, hydraulic torque converters, band brakes, shock prevention devices for machines, ball transfer units; starters for motors and engines; AC motors and DC motors not including those for land vehicles and including "parts" for any AC motors and DC motors, namely, compressors, brushes, pumps, taps, faucets, filters; AC generators namely alternators; DC generators