... Ring, Quad-Ring, Glyd-Ring, Step Seal, Mechanical Seal, Extrusion Seals, Rotating Seals and wearable 1.Maunly uses in the oil seal, each king ... , locomotive, diesel engine and each fuel system.2.each king of chemical seal. 3. Various materials and hardness for ... automobile, locomotive, diesel engine and each fuel system.2. Each king of chemical sealwe received the ISO9001 & ISO16949 , American NSF, ...