Integral Short Drill Rod Type DZ.
型整体式短钻杆。
I need a drill to make a hole for the rod.
我需用钻在杆上钻个孔。
Friction Welding and Heat Treatment for Geological Drill Rod.
地质钻杆的摩擦焊接和热处理
Rational Analysis and Application of Drill Rod Detection Results in Construction Test Tanks
施工验槽钎探结果的合理分析与使用
Equipped with hydraulic holder and hand powered unscrewer, to untighen the drill rod easily.
附设液压夹持器，并配以手动御扣装置，使拆御钻杆更方便。
The pressure of the under well drill rod which even works in the caustic medium is extremely complex.
钻柱在井下的受力极度复杂, 甚至工作在腐蚀性介质中。
This article uses magnetism examination the method, to drill rod collar whether arrives conducts the research.
本文采用磁检测得方法，对钻杆接箍是否到位进行研究。
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