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标题: 高聚物的化学变化 [打印本页]

作者: hf101010    时间: 2008-5-27 17:35
标题: 高聚物的化学变化
高聚物的化学变化
作者: fredfeng    时间: 2008-5-30 00:22
标题: chemical reaction
it's real useful to understand chemical reaction and degradation




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