... rock bit 牙轮钻头 ; 岩石锧头 ; 岩石钻头 rolling cutter rock bit 牙轮钻头 cross roller rock bit 十字形四牙轮钻头 ...
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tricone rock bit 三牙轮钻头 ; 三维式岩石钻头
cone rock bit [机] 锥形凿岩钻头
insert rock bit 镶硬合金齿牙轮钻头
rock-bit interaction 岩石与钻头互相作用
rock bit testing rig 牙轮钻头试验钻机
sealed bearing rock bit 密封轴承牙轮钻头
rock bit cone fishing socket 牙轮的打捞工具
Tri-cone rock bit is the important tool in oil drilling,so its capability and quantity affect the speed and cost of oil drilling greatly.
三牙轮钻头是石油钻井的重要工具，其性能和质量对钻井速度和成本影响很大。
参考来源 - 基于PRO/E的三牙轮钻头CAD系统的研究与开发How to improve the working performance of rock bit journal bearings (RBJB) and prolong its life span under high working speed is one of the urgent problems faced by oil drilling engineering.
如何提高现有牙轮钻头轴承的工作性能，延长其在高转速下的使用寿命，是目前钻井工程领域迫切需要解决的问题之一。
参考来源 - 牙轮钻头浮动套轴承工作机理研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Water jet flow is one of the decisive factors for drilling rate during rock bit drilling.
在牙轮钻头的钻进中，水射流是钻进速度快慢的决定因素之一。
A new type rock bit with bearing liner structure has been developed and tested on the spot.
研制了一种新型的镶套轴承结构牙轮钻头，并进行了现场试验。
There are many causes inducing rock bit cone break, in which the effect of its machining on the cone is more serious.
造成钻头牙轮破裂的原因是多方面的，其中钻头机加工对牙轮开裂的影响较大。
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