rock roller bit

基本解釋

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.
為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鉆頭滾動軸承系統(tǒng)的工作性能，可以在大圓柱滾子軸承中實施變曲率結構方案。
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.
采用深孔牙輪鉆機、利用高臺階崩落法成功地處理了復合采空區(qū)，解決了復合采空區(qū)處理難的問題，使技術人員在熟練淺采、深采空區(qū)處理的情況下，又探索出復合采空區(qū)的處理方法。
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.
牙輪鉆頭牙齒破巖機理研究一直是鉆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視。
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