3397| 5
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请教冷拔钢,和45#钢进行比较 |
发表于 2013-1-23 16:49:32
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哦,对材料懂的少,那45#冷拔和普通45#区别呢
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发表于 2013-1-23 19:35:12
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发表于 2013-1-23 22:35:33
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