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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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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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