Pipeline construction
    3.
    发明授权
    Pipeline construction 失效
    管道施工

    公开(公告)号:US3675432A

    公开(公告)日:1972-07-11

    申请号:US3675432D

    申请日:1971-02-28

    Inventor: KEENE WILLIAM A

    CPC classification number: F16L59/15 F16L59/12

    Abstract: In order to insulate a pipeline from the earth in which it is buried, the pipe is surrounded by a mass of dry earth, sand and/or gravel and a water-impermeable membrane.

    Abstract translation: 为了将管道与其埋藏的地球绝缘,管道被大量的干土,沙子和/或砾石和不透水的膜包围。

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