vacuum flange connection
... 研磨面搭接封接ground and lapped seal 真空法兰连接vacuum flange connection 真空密封垫vacuum-tight gasket ...
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以真空阀门、真空泵及真空法兰连接件三大类为主导产品，拥有自营进出口经营权和十多项自主研发的专利产品。
Vacuum valves, vacuum pumps and vacuum flange connections are the three leading products, we possess import-export operations, and more than ten self-developed patent products.
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