2011-6-5 20:38:47
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2011-6-5 20:40:46
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2011-6-5 20:42:14
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2011-6-5 20:43:58
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点评
北京杨斌
2011-6-5 22:53
醋酸乙烯酯分子式CH3COOCH=CH2,无色易燃液体,有甜的醚香味,用于生产聚乙烯醇,涂料及粘合剂
2011-6-5 20:46:32
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2011-6-5 20:49:39
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2011-6-5 20:54:10
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2011-6-5 20:57:09
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2011-6-5 21:00:26
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