bit design的用法和样例：
例句
- The diamond bit design expert system and the computer controlled system for the bit production are described with their uses in production.
介绍了金刚石钻头设计的专家系统和钻头制造的微机自动控制系统，以及在生产中使用的情况。 - 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。
