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                      oúVϵļgҪ
                      1oúVϵʺĥp֮Ͳ3%ٷʰ|Ӌͬ
                      2oúVϵƽܶһ㲻С1.4g/cm31.6g/cm3
                      3oúVϑҊ퓎rмoú3%ܶȴ1.8g/cm3|8%
                      4oúVϵ}ʲ3.5%
                      oúVϵ
                      1ˮğoúVϵ飺0.8-1.2mm1.2-2mmIˮoúVϵ飺1-2mm2-4mm4-6mm
                      2ڸNğoúСָIJ3%ָIJ2%
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                      80

                      3.5

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                      1.3

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                      0.95

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                      1.5

                      2

                      ϶ʣ

                      43

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