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didadida321

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2Â¥: Originally posted by ZBPJJ529810 at 2012-08-30 10:09:20
ÃܱÕÌåϵ¸ßÎÂÏ£º10C + 2P2O5 = 10CO + P4

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4Â¥: Originally posted by jiagle at 2012-08-31 08:59:53
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