expanded joint

例句：

1. 1.The engineer used a special tool to expand the joint.
   工程师使用一种特殊的工具来扩展接头。
2. 2.The construction crew had to remove the expanded joint before they could continue work.
   施工队伍在继续工作之前必须移除扩展接头。
3. 3.The new design uses an expanded joint to improve structural integrity.
   新设计使用了扩展接头来提高结构的完整性。