Machine coupling and belting except for land vehicles; Handbrake knobs for machines; Bellows being parts of machines; Dynamo brushes; Pressure switches as parts of machines; Air powered tools, namely, saws; Valves being parts of machines; Self-lubricating mechanical friction parts, especially of composite materials, namely, wear rings, washers, bushings, spherical bearings, bearing pads, sliding blocks and machine transmission gears all for load bearing machines, conveyors, handling trucks an...