5884| 15
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如何保證槽底粗糙度Ra1.6 |
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點(diǎn)評(píng)
還有火花加工
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點(diǎn)評(píng)
設(shè)備達(dá)不到,人工上也能,模具表面那高要求,不都人工打出來的
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