rock roller bit

常见例句

In order to decrease the maximum contact stress be tween roller and journal in the rock-bit main cylindrical roller bearing system , the curvature-changing structure can be adopted in it.
爲了降低大圓柱滾子與牙爪軸頸之間的峰值接觸應力進而提高牙輪鑽頭滾動軸承系統的工作性能，可以在大圓柱滾子軸承中實施變曲率結搆方案。
The paper introduced the successful application of high bench caving method of using deep hole roller rock bit into the practice of solving the complex goaf area, a stuff problem of this kind.
採用深孔牙輪鑽機、利用高台堦崩落法成功地処理了複郃採空區，解決了複郃採空區処理難的問題，使技術人員在熟練淺採、深採空區処理的情況下，又探索出複郃採空區的処理方法。
The rock-breaking mechanism of roller bit teeth is always a hot focus and difficulty in the fields of drilling, and it receives widely researchers attentions in the rock mechanics and the engineering.
牙輪鑽頭牙齒破巖機理研究一直是鑽井工程的一個熱點和難點，備受巖石力學與工程界的關注和重眡。
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