keyseat

In the thesis the author analyzes the current punching situation of keyseat and mark hole when making electric motor iron core;

分析了电机铁芯制造时键、记号孔冲制的现状;

Then after thick, the essence two axle diameter localization drills the thread, the keyseat and the mill crank end surface.

机械加工工艺是规定产品零件机械加工工艺过程和操作方法，是指导生产的重要的技术性文件。