trench cover

例句：

1. 1.The engineers used a trench cover to protect the tunnel from damage.
   工程师们使用隧道覆盖物来保护隧道免受损坏。
2. 2. The trench cover was designed to withstand heavy traffic.
   隧道覆盖物被设计成能够承受重交通的压力。
3. 3.The workers carefully removed the trench cover to inspect the tunnel.
   工人们小心翼翼地移除了隧道覆盖物以检查隧道。