service tunnel

• 工作隧洞

service tunnel的用法和样例：

例句

1. The train will pass through a tunnel.
   火车将要穿过一个隧洞。
2. With the development of the tunnel and underground project construction technology, the waterproof requirement to structure is higher and higher.
   摘要随着隧洞和地下工程施工技术的发展，对结构防水的要求越来越高。