pit limit

例句：

1. 1. The engineer determined the pit limit for the tunnel.
   工程师确定了隧道的坑底限制。
2. 2.The project team must adhere to the pit limit set by the safety regulations.
   项目团队必须遵守安全规定设定的坑底限制。
3. 3. The construction crew had to work within the pit limit to ensure the safety of the workers.
   施工队伍必须在坑底限制内工作，以确保工人的安全。