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.
為了降低大圓柱滾子與牙爪軸頸之間的峰值接觸應(yīng)力進(jìn)而提高牙輪鉆頭滾動(dòng)軸承系統(tǒng)的工作性能，可以在大圓柱滾子軸承中實(shí)施變曲率結(jié)構(gòu)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(jī)、利用高臺(tái)階崩落法成功地處理了復(fù)合采空區(qū)，解決了復(fù)合采空區(qū)處理難的問題，使技術(shù)人員在熟練淺采、深采空區(qū)處理的情況下，又探索出復(fù)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(jī)理研究一直是鉆井工程的一個(gè)熱點(diǎn)和難點(diǎn)，備受巖石力學(xué)與工程界的關(guān)注和重視。
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