Parts of motors and engines, namely, components for housing, namely, housings for oil pumps and for fuel injection pumps, gears, sprockets, components for variable valve timing systems, namely, rotors, stators, flanges, gears, sprockets, cams, camshaft and crankshaft, bearing caps, pulleys; machine coupling and transmission components except for land vehicles, namely, sintered parts for the power train, for fuel injection pumps and for diesel injection pumps