well connecting pipe

常见例句

Tube wells in the ground, first install the valve connecting the end of tube wells three, in the well pipe at the top of the order to install valves and killing head and hands;
在地面的井管上，首先安装底阀连接井管三通，在井管上方依次安装阀门和和手压井头；
The paper introduced common troubles of city gas pipe on-line connecting works, their causions were found by trouble shooting, as well as the prevention measures were put forward.
分析了城市燃气管道不停输带气连接作业中常见的故障，通过对故障原因的分析找出了主要原因，并提出相应的预防措施。