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: 4307334
й 14 ؤŷ ͹Ź
silica ԡ PDF
ûСͺԴ˹  ٵդ  SiO2 ش  1,700 oC شʹ  2,230 oC  繢ͧçҧ֡ 5 ٻẺ 㹸ҵٻͧ  ǵԹҧԴصˡüԵ Ѵ  ʴط мԵѳԡ  繵
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