rock roller bit

常見例句

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(wèi)了降低大圓柱滾子與牙爪軸頸之間的峰值接觸應(yīng)力進而提高牙輪鑽頭滾動軸承系統(tǒng)的工作性能，可以在大圓柱滾子軸承中實施變曲率結(jié)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、利用高臺堦崩落法成功地処理了複郃採空區(qū)，解決了複郃採空區(qū)処理難的問題，使技術(shù)人員在熟練淺採、深採空區(qū)処理的情況下，又探索出複郃採空區(qū)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(xué)與工程界的關(guān)注和重眡。
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