Set up and operate machine tools to perform repetitive machining operations, such as turning, milling, drilling, boring, planing, honing, broaching, grinding or other machining operations.
安装和操作机器工具来执行反复加工操作，如车，铣，钻，镗，刨，珩磨，拉削，磨削或其他加工业务。
To solve this problem, The author analyzes the reasons why the errors are generated in turning (boring) and designs the special machine, in which the rotation of part is main moveme.
为了解决这个问题 ，作者分析了车削 （镗削 ）加工台阶孔时 ，误差产生的原因 ； 并设计了车削该台阶孔的专用机床 ：工件的旋转作为主运动 ，两把车刀从两端进给运动 ，分别车削两段台阶孔。
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