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优一(YOUYI)
YIZHONGMAHUAZUANRECHULIFANGFA
优一(YOUYI)
YIZHONGMAHUAZUANRECHULIFANGFA
优一(YOUYI)
YIZHONGMAHUAZUANRECHULIFANGFA

Working piece: 5cm thickness, HRC 21° Metal

After tested, our HSS M2 Taper shank drill in Φ18mm can drill at least 90holes in 430 rotation speed

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