line monitoring tube

例句：

1. 1.The line monitoring tube is used to monitor the flow of oil in the pipeline.
   线监测管用于监测管道中石油的流动。
2. 2.The line monitoring tube was installed to improve the safety of the construction site.
   线监测管的安装是为了提高施工现场的安全性。
3. 3.The line monitoring tube was used to detect any leaks or faults in the pipeline.
   线监测管被用来检测管道中的任何泄漏或故障。