... nucleus.sealed, bearing,follower, worder water valve platen,machine tool dewa Characteristic: Fill polytetra-fluoro-ethylene products by polytetra-fluoro ... stableness and so on get different degrees raise. . Fill up dose: General stuffing have glass fiber,supramoly, graphite ... packing ring, lead nucleus.sealed, bearing,follower, worder water valve platen,machine tool deway, engine sealed and so ...