楼主: liyujie0042
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[求助] P91管道及焊缝硬度的下限值(一般上限值≤250HB) |
发表于 2009-12-28 15:42:33
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发表于 2010-1-12 06:47:57
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发表于 2010-4-26 17:30:36
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发表于 2010-4-30 17:32:55
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