Prime movers other than for land vehicles, namely, engines; mechanical components for valve control in internal combustion piston engines; machine components, namely, thread guide rollers, guide bars and shafts with tracks and for rolling bearings; levers in textile machines; universal joints not for land vehicles; machine parts, namely, spherical plain bearings, sliding bearings, stud-type track rollers, bearings for slewing motion, bearings for longitudinal motion, bearing bushings, bearing...