ϽB |
a(chn)ƷxÉKiVȻɰԭ(jng)Yx^ֲʺɫõijFi iɰVܷ (xing)Ŀ MnO2 % Fe % SiO2 % g/cm3 ѱ% (sh)(j) 15-45% 20% 17-20% >3.2 2 |
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