... products. That include self-lubricating major production entities copper sets of machining, solid mosaic bushings, linear bearings, lubricating fittings, ... 2.The Bimetal Bushes is based on the material of high quality low-carbon steel plate and with lead- ... shafts, steel plate springs, motorcycle clutches, rubbing plate of gear pumps and hoisting machines etc.3.ISO9001:2000,ISO1400 system certified ...