roller bit
英
美
- 牙轮钻头
roller bit的用法和样例:
例句
- 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。