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钢结构工程
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管道截面的惯性矩怎么计算啊？是不是I＝PI＊（D＊D＊D＊D－d*d*d*d)/32
遇到了一点小问题
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只看楼主 我来说两句-
lei85852246
沙发
頂頂頂頂頂頂頂頂頂頂頂頂頂頂頂████████████████頂頂頂頂
2008-05-27 18:24:27
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wangcheng_301
板凳
谢谢楼主了，不过好像下载不了哦，请在上传看看！
2008-05-16 19:49:16
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加载更多頂頂頂頂頂頂頂頂頂頂████頂頂██████████頂頂頂頂頂頂頂頂頂
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好不容易找到的东西，下不了很郁闷的！
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