snagline

例句：

1. 1. The train's snagline is worn down by the constant use.
   火车的拉线因持续使用而磨损。
2. 2.The engineer used a snagline to mark the path of the tunnel.
   工程师用拉线标记了隧道的路径。
3. 3.The snagline was crucial in guiding the construction workers.
   拉线在引导施工工人方面至关重要。