9202| 19
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外圓磨床磨45#調(diào)質(zhì)軸用什么材質(zhì)的砂輪 |
點評
粒度60#-100#
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點評
不分粗精磨,車加工留50絲磨量上磨床直接磨成品
評分
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點評
碳化硅的吧?
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