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。
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。
The Udachny pipe. The scale of the work done by human hands is difficult to show in the photo or even video.
乌达奇内岩石筒。人工手工作业情景由于目标太小无法用照片或者视频呈现。
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