lock butt joint

例句：

1. 1.The engineer used a special tool to lockthe butt joint of the pipe.
   工程师使用特殊的工具来锁住管道的尾端接头。
2. 2. The carpenter carefully lockedthe butt joint to ensure it wassecure.
   木匠仔细地锁住了接头，以确保它牢固。
3. 3. The construction workers had to tightenthe butt joints to make sureeverything fit together properly.
   建筑工人必须拧紧接头以确保一切正确连接。