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[求助] 半年之前淬火的,半年之后表面硬度怎么变了? |
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发表于 2012-10-31 21:42:23
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发表于 2012-11-3 06:22:16
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发表于 2012-12-27 14:49:07
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发表于 2012-12-27 20:14:21
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发表于 2012-12-30 11:40:45
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