| 释义 |
roller bit ˈrəuləbit
基本英英近义反义例句
牙轮钻头
Noun:
a drill bit that has hardened rotating rollers近义词 rock bit凿岩钻头
The desig ner should consider comprehensively the effect of structure data and radial clea rance on the life of the roller bearing, in order to make optimum design.钻头设计要优化轴承结构参数和径向游隙，以提高国产牙轮钻头的寿命。 |