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·2,447,543篇论文数据，部分数据来源于NoteExpress
Assemble inserts and cones respectively, and prepare for calculating 3d engaging distance of tri-cone rock bit.
对牙轮和牙齿分别进行了装配，为三维啮合间隙计算做了充分准备。
The structure of tri-cone rock bit is complicated. As the cutting structure touch the stratum directly, it affects the process of breaking rock and the performance of tri-cone rock bit.
三牙轮钻头结构复杂，其中齿面结构直接与地层接触，对于岩石破碎过程和钻头工作性能的影响最大。
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