Prime movers other than for land vehicles, namely, engines; Mechanical components for valve control in internal combustion piston engines; Belt tensioning devices for machines and their components; Machine parts, namely, spherical plain bearings, sliding bearings, stud-type track rollers, bearings for slewing motion, bearings for longitudinal motion, bearing bushings, bearing housings, housings for rolling bearings, bearing components and race rings as parts of rolling bearings, track rollers...