Rubber sealing rings are mainly used for oil-proof, waterproof, anti-corrosion, gas sealing and leakage prevention. There are many kinds of rubber sealing ring products, the most commonly used are rotary shaft lip sealing ring, O-shaped rubber sealing ring, various section sealing rings, diaphragms, valve gaskets, sealing gaskets and sealing strips, etc., which can also be divided into There are three types of static seals, dynamic seals and high vacuum seals.