Chains for conveyors; Dish washing machines for household purposes; Machine parts, namely, bearing housings; Machine parts, namely, bearing inserts; Machine parts, namely, bearings and bushings; Machine wheelworks; 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, construction equipment machines and hydraulic turbines; Shaft couplings as parts of machines; Shaft couplings for machines; Wet-cleaning washing machines