tun-nel structure gauge

例句：

1. 1. Theengineer used the tunnel structure gauge to measure the length of the tunnel.
   工程师使用隧道结构测量仪来测量隧道的长度。
2. 2.The tunnel construction gauge was used to ensure that the tunnel was built to code standards.
   隧道施工测量仪被用来确保隧道按照规范标准建造。
3. 3. The tunnel inspection gauge was used to detect any structural issues before the tunnel was opened to traffic.
   隧道检查测量仪被用来在隧道开放给交通之前检测任何结构问题。