cast iron pipe joint

例句：

1. 1.The construction crew used cast iron pipes to connect the two buildings.
   建筑工人使用铸铁管连接了两座建筑物。
2. 2.The plumber replaced the cast iron pipe joint with a new one.
   水管工用一个新的铸铁管接头替换了旧的。
3. 3.The engineer designed the cast iron pipe joint for efficient water flow.
   工程师设计了这种铸铁管接头，以便于水流。