... 标准钻杆接头 standard tool joint 外螺纹钻杆接头 tool joint pin 钻杆接头螺纹 tool joint thread ...
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tool joint thread gage 钻杆接头螺纹量规 ; 钻杆评论申辩螺纹量规
left-hand tool joint thread 左旋钻杆接头螺纹
hand tool joint thread 左旋钻杆接头螺纹
·2,447,543篇论文数据，部分数据来源于NoteExpress
This article proves that rolling operation can largely enhance fatigue strength through the research on the cold rolling operation of thread root of the drilling tool joint.
通过石油井下钻具接头螺纹冷滚压工艺的研究可以证明冷滚压可大大地提高接头的疲劳强度。
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