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洛氏硬度与布什硬度的区别? |
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发表于 2007-12-19 16:24:41
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发表于 2007-12-19 19:40:32
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发表于 2007-12-20 12:36:14
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点评
简洁明了
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发表于 2007-12-20 14:33:00
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发表于 2007-12-25 17:23:27
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