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已知到變形量,如何算所需要的力? |
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點(diǎn)評(píng)
樓主的演算有兩點(diǎn)不對(duì)的地方:1.算應(yīng)變的時(shí)候應(yīng)該是除以29.5pi,,2.面積單位換算的時(shí)候應(yīng)該是212.5*10^-6
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