Some familiar problems and causation is analyzed as some parts with small hole are flanged, therefore the method dealing with problems is put forward.
分析了小孔翻边时常见的质量问题及原因，提出了解决问题的方法。
When traditionally processing the parts with small deeper hole by the method of drill, there is certain difficulty in excluding bits and the bit is broken easily.
传统上采用钻孔方法加工小孔径深孔时，存在排屑困难、钻头易折断等缺陷。
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