3743| 9
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HRC50的工件需要用什么鉆頭 |
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點(diǎn)評(píng)
這么高硬度必須硬質(zhì)合金鉆頭才干得動(dòng)
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點(diǎn)評(píng)
如與標(biāo)題無關(guān)聯(lián),請(qǐng)另開貼討論,。
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