DictionaryForumContacts

   Chinese English
Google | Forvo | +
4,4'一氧双邻苯二甲酸酐
polym. 4,4'-oxydiphthalic anhydride (ODPA)
4,4,一氧双邻苯二甲酸酐
polym. 4,4'-oxydiphthalic dianhydride