threaded wrought iron pipe

例句：

1. 1.The new water supply system uses threaded wrought iron pipes to improve efficiency.
   新的供水系统使用螺纹铸铁管来提高效率。
2. 2.The construction crew used threaded wrought iron pipes to connect the underground pipelines.
   施工队使用螺纹铸铁管连接了地下管道。
3. 3.The engineer recommended using threaded wrought iron pipes for the new project.
   工程师推荐使用螺纹铸铁管为新项目。