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    ʯӢɰSֱNʯӢɰVɰʯӢɰNҎ(gu)_99.9Ҏ(gu)0.5-1.0mm 0.6-1.2mm 1-2mm 2-4mm 4-8mm 8-16mm 16-32mm.mm׆λGh(hun)Ƽ޹˾aʯӢɰͨʯӢɰSiO29099 Fe2O30.060.02ͻ1750^ִwSƤȷ5220Ŀ

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