Plain bearings for rotary movements being parts of machines; plain bearings for longitudinal movements being parts of machines; spherical plain bearings being parts of machines; parts of bearings, namely, bearing cages and bearing housings being parts of machines; spherical roller bearings for machines, and cylindrical roller bearings for machines; bearing bushes for use as parts of machines; rod-socket heads for use as parts of machines; couplings other than for land vehicles, namely, coupli...