pilot tunnel

  • 导洞

pilot tunnel的用法和样例:

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.
    在许多隧道工程中,经如辛普龙大隧道,都要在隧道全面开挖前打一个导洞。

pilot tunnel的相关资料:

临近单词

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