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An O-ring rubber seal is a type of rubber seal with a circular cross-section, also known as an O-ring or O-ring seal. It is widely used in various hydraulic and pneumatic systems as a static seal and reciprocating motion seal.

The O-ring rubber seal has a small size and is easy to assemble and disassemble, making it suitable for various static and dynamic sealing situations. Its dynamic and static seals are both available, with characteristics similar to high surface tension liquids, allowing it to achieve absolute sealing without leakage under pressure.

The bidirectional sealing function of the single piece O-ring rubber seal makes it very convenient to install, and its low friction and low price also make it an economical and practical seal.

Overall, O-ring rubber seals are a very common type of seal and have wide applications in various industrial and equipment manufacturing fields.