2504| 7
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截面的力學(xué)特性 |
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點(diǎn)評(píng)
工作中碰到要選材,看受力是否夠,。設(shè)計(jì)的大學(xué)生按照本本計(jì)算了,,不理解公式的含義,是否需要理解
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點(diǎn)評(píng)
提了,,靜觀是否會(huì)去看書(shū)
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