12 PARTS FOR VEHICLES, INCLUDING LAND VEHICLES, SHIPS, BOATS, SUBMARINES, AND FIXED AND ROTARY AIRCRAFT, INCLUDING PARTS FORMED BY CASTING AND SINTERING, NAMELY, PUMPS, GEARS, GEAR WHEELS, PULLEYS, CHAIN WHEELS, SPROCKETS, LINERS, CYLINDER LINERS, BEARINGS, BUSHINGS, AND CAMSHAFT ADJUSTING MECHANISMS, AND STRUCTURAL PARTS FOR LAND VEHICLES, SHIPS, BOATS, SUBMARINES, AND FIXED AND ROTARY AIRCRAFT