HRC 55 ~HRC 60 ~HRC 65 ... 硬度. Rotating Speed. 轉速. FEED. 進給. AP. 軸向深度. Finishing. 精加工. R3 * 2F. SKD11. 合金鋼. HRC 55~58. 12,000. 2,000 mm⁄min.
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