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.

youdao

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.

youdao