bell-and-plain end joint

例句：

1. 1.The engineer designed a bell-and-plain end joint for the pipeline.
   工程师为管道设计了一个圆管接头。
2. 2. The construction crew used a bell-and-plain end joint to connect the pipes.
   施工队使用一个圆管接头来连接管道。
3. 3. The bell-and-plain end joint was crucial for ensuring the integrity of the pipeline system.
   这个圆管接头对于确保管道系统的完整性至关重要。