Through the design special tooling realize parts wear silk hole processing;
通过设计专用工装实现零件穿丝孔的加工；
The processing method for inside whorl of middle and small hole is introduced.
介绍了中小孔径内螺纹的加工方法。
The long axis diameter processing, need to resist center hole;
加工长轴外径时，需顶住中心孔；
Research of Heterogeneous Type Piston Pin Boss Hole Closed Loop Processing System.
异型活塞销孔闭环加工系统研究；
Research of Heterogeneous Type Piston Pin Boss Hole Closed Loop Processing System.
异型活塞销孔闭环加工系统研究；
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