Before installing, flush pipe line to remove scale and debris.
在安装之前，冲洗管道，清除水垢和碎片。
2
Full-scale fatigue test of drill pipe and borehole tests of drill pipes containing defects prove the reliability of assessment methods and software posed in this paper.
通过钻杆全尺寸疲劳试验和含有缺陷钻杆的井下试验，证明了本文提出的评价方法和软件是可靠的。
3
The Udachny pipe. The scale of the work done by human hands is difficult to show in the photo or even video.