Machine coupling and transmission components, except for land vehicles; parts of machines and machine tools, namely, driving belts and conveyor belts, in particular toothed belts, tracked toothed belts, [ toothed lock washers and tracked toothed lock washers; ] conveyor belts and belts for conveyors, [ cam belts for machines, cams for toothed belts, workpiece holders, synchronising discs and shafts in machines; machine parts, namely, tension rollers for bands and belts, clamping joints and cl...