pilot drift

 
  • 導洞

pilot drift的用法和樣例:

例句

  1. In many projects, like the Simplon, for example, a small pilot tunnel is driven before the full diameter of the tunnel is excavated.
    在許多隧道工程中,經(jīng)如辛普龍大隧道,都要在隧道全面開(kāi)挖前打一個(gè)導洞。

pilot drift的相關(guān)資料:

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