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请教纲丝绳的破断力和抗拉力怎么算哟。 |
发表于 2008-12-14 17:46
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回复 1# sps677 的帖子
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发表于 2008-12-14 21:05
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终合同行的发帖
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发表于 2008-12-21 22:08
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还有一种办法!
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