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    ʯӢɰһN(jin)ӲĥW(xu)ܷ(wn)Ĺ}VҪVɷSiO2 ʯӢɰɫɫo(w)ɫ͸Ӳ7Դo(w)ؐڣ֬ܶȞ2.65ѷeܶȣ1-20Ŀ1.6~1.820-200Ŀ1.5仯W(xu)W(xu)͙C(j)еܾ@Įᣬ΢KOHҺc(din)1750 ʯӢɰ;;첣ͻұFұۄմɣĥ

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