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ڣ2018/12/25 16:04:50
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MʽP䓱ˮıЧȡQıزϺͨf،Խ񱣜ЧԽؕrgҲԽLMʽP䓱ˮ䳣24СrȿɌضȿڽ8ԃ


ˮăr

MʽP䓱ˮărǰձeӋe = (L + L + )2 r = eP䓃r/ m2ڲP䓵ărSЈԽMʽP䓱ˮăr߀ҪԏSҮĈrMʽP䓱ˮăr߀Ҫӹ\ݔbһЩ~ķM


ˮ;
С^WУ˜Iλa܇gtԺƵҪõˮĹˮ偠tOıˮ՚ԴOăˮO̫ܱO

 

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