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楼主: hgs811230
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[求助] “材料许用应力与厚度的关系”为何美标和国标不一样? |
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发表于 2014-12-11 10:31:17
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发表于 2014-12-11 10:32:05
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发表于 2014-12-11 12:26:38
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发表于 2014-12-11 12:58:01
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发表于 2014-12-11 12:59:54
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发表于 2014-12-11 13:17:37
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发表于 2014-12-11 16:12:05
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发表于 2014-12-12 11:18:50
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发表于 2014-12-13 10:34:26
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