• 论述插式铸铁优点设计原理,实践证明效果良好,值得推广。

    The paper introduces design principle of pipe well using socket and spigot connected cast iron pipes as pipe material. The results are effective.

    youdao

  • 论述插式铸铁优点设计原理,实践证明效果良好,值得推广。

    The paper introduces design principle of pipe well using socket and spigot connected cast iron pipes as pipe material. The results are effective.

    youdao

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