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說點(diǎn)敬業(yè)的閑話, |
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點(diǎn)評(píng)
確實(shí),確實(shí),于是乎,不混也得混!
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點(diǎn)評(píng)
不規(guī)則斷面手工算是很麻煩的。只要知道慣性矩是微元面積對(duì)中性軸的二次矩積分就行了。
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