Piston rings being engine parts; Machine parts, namely, wear plates and strips; Automatic swimming pool cleaners and parts therefor; Valves being parts of machines; Machine parts, namely, bearings and bushings; Belts for machines; Machine parts, namely, roller bearings; Lawnmowers; 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 bea...