7 Pneumatic and hydraulic engines for machines and parts therefor; machine parts, namely, transmissions, belts, clutches, crank shafts, hydraulic controls, valves for hydraulic control units, gears, gear boxes, transmission chains, dampers in the nature of shock absorbers, fluid couplers, torque converters and valve springs, not for land vehicles; oil pumps for use in motors and engines; oil pumps for land vehicles; electromagnetic oil pumps for use in motors and engines; electromagnetic oil pumps for land vehicles; machine elements not for land vehicles, namely, crank shafts, shaft bearings, shaft couplings, power transferring devices in the nature of power transmission belts and power transmissions and gearing for machines, shock absorbers, valve springs, braking devices in the nature of brakes for machines, valves, motor starters; electric motors for machines; parts for electric motors for machines, not for land vehicles; AC generators; DC generators