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足球外围app????:13938512513

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? ?:http://www.jiajiaoxuecheng.com

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1???:???KXCl50?KXC175?KXC200?KXC250

2???????:37.9%

3??????:2.22g/cm3

4?????:67.7MPa

5?????:27.3MPa

6??????:SiC

7????:0.8m3/m2·min

8???:>400?

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