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ϲѺͬġ

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Σ2·5ϵԪϣ/ͣƽ۸Ϊ178885.71Ԫ/΢0.01%ͬ59.01% ﮣѹʵܶȡ2.50g/cm?ƽ۸Ϊ53446.43Ԫ/µ2.16%ͬ56.82% ҺԪãƽ۸Ϊ33142.86Ԫ/µ10.33%ͬ30.87% 

ݸƷԴҡ

гؾ ½ɺɺ֮ǰǼ˾ϲЩҥ˵ʲôȱپ͵ȥ Ǽҵڻһû 

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