Belts for machines; Machine parts, namely, bearings and bushings; Machine parts, namely, roller bearings; Machine parts, namely, wear plates and strips; Piston rings being engine parts; 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 and machines, lifting machines, agricultural machinery,...