Factory production of SF-1 (DU) oil-free bearings, SF-2 (DX) self-lubricating bearings, bushings, bronze bushings, solid # 500 JDB, copper sleeve, JF800 bimetal bush, PTFE soft tape and other products for automotive shock absorber guide sleeve, piston rings, door hinge bushing, transmission bushings, engine connecting rod bushing and mold, machine tool manufacturing sliding transmission parts.