5526| 14
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硬質(zhì)合金階梯鉆倒角刃有小缺口,請教 |
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點評
還有是同一廠家,同一批產(chǎn)品嘛? 會不會廠家換了,棒料變了,制造參數(shù)也變了,(我說的變不是輪廓參數(shù),小徑,大徑,階梯角度的變化)
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