rock bit

基本解释

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。
With 20 rock bits which used in the field, bearings' surface metallography, rigidity, and the main factors influence the life of the rock bit journal bearings were studied.
收集了近几年20只现场失效牙轮钻头，对其轴承表面金相组织和硬度以及影响牙轮钻头滑动轴承失效的主要因素进行了分析。
On the basis of the interaction model between formation and rock bit, a lateral vibration dynamic model of the rock bit was established under the interaction between drilling string and rocks.
在建立牙轮钻头与井底岩石互作用模型的基础之上，建立了基于钻柱和岩石互作用下的牙轮钻头横向振动动力学模型。

Nor does much of his music. It is a little bit country, a little bit rock and roll.
The Navajos have their own red-rock tribal park, called Monument Valley, that's every bit as spectacular as U.S.national parks elsewhere in the Southwest.

One's a little country (Ginger Hendrix), one's a little bit rock 'n' roll (Elizabeth Street).
NPR: Zooglobble Favorite Kids' Albums of 2006
He looked every bit the rock star wearing sunglasses as he walked through a throng of Cardinals and race fans who had waited patiently outside the barn.
NPR: Louisville Coach Chasing Derby Win As A Co-Owner

牙轮钻头
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。
机械工程
牙轮钻头
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。
地球科学
钎头