rock bit

基本解释

Water jet flow is one of the decisive factors for drilling rate during rock bit drilling.
在牙輪鑽頭的鑽進中，水射流是鑽進速度快慢的決定因素之一。
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.
收集了近幾年20衹現場失傚牙輪鑽頭，對其軸承表麪金相組織和硬度以及影響牙輪鑽頭滑動軸承失傚的主要因素進行了分析。
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.
在建立牙輪鑽頭與井底巖石互作用模型的基礎之上，建立了基於鑽柱和巖石互作用下的牙輪鑽頭橫曏振動動力學模型。

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

牙輪鑽頭
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.
三牙輪鑽頭是石油鑽井的重要工具，其性能和質量對鑽井速度和成本影響很大。
機械工程
牙輪鑽頭
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.
如何提高現有牙輪鑽頭軸承的工作性能，延長其在高轉速下的使用壽命，是目前鑽井工程領域迫切需要解決的問題之一。
地球科學
釺頭