• 图纸特殊要求衬砌背后之排入隧道内侧水沟或中央排水管内

    When there are no particular requirements on the Drawings, water flow behind the lining shall all be drained into the inner side ditch of the tunnel.

    youdao

  • 图纸特殊要求衬砌背后之排入隧道内侧水沟或中央排水管内

    When there are no particular requirements on the Drawings, water flow behind the lining shall all be drained into the inner side ditch of the tunnel.

    youdao

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