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US3134755A Polyurethane plastics prepared from the reaction product of an aldehyde and an oxyalkylated aromatic amine 失效
由醛和烷氧基化芳族胺的反应产物制备的聚氨酯塑料

Polyurethane plastics prepared from the reaction product of an aldehyde and an oxyalkylated aromatic amine
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