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锥柄♂扩孔钻

标准形式Standard No 材料Material 螺旋角Spiral angle

GB/T 4265 Q/74034169-5. 05-2012 HSS 20°

注：企标Q/20197304-4. 212014d偏差中的NO.1号扩孔钻主要用于铰孔前〓的扩孔，N0.2号扩孔钻主要用于D6级精度孔⌒　的最后加工。

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