• It is also part of the watertight envelope, and subject to the local water head.

    它也是水密外壳的组成部分,并承受局部水压力。

    youdao

  • It is also part of the watertight envelope, and subject to the local water head.

    它也是水密外壳的组成部分,并承受局部水压力。

    youdao

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