O-Ring, Oil Seal, Gasket, U-Ring, Quad-Ring, Glyd-Ring, Step Seal, Mechanical Seal, Extrusion Seals, Rotating Seals and wearable ... of mechanical seal, on automobile, locomotive, diesel engine and each fuel system.2.each king of chemical seal. 3. Various materials ... of mechanical seal, on automobile, locomotive, diesel engine and each fuel system.2. Each king of chemical sealwe received the ISO9001 ...