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According to the composition of Category: paraffin-based crude oil, naphthenic oil and three types of intermediate base crude oil; 按組成分類：石蠟基原油、環烷基原油和中間基原油三類；
The research proved that the copolymer have very good pour point depressing effect on paraffin-base crude oil. It is a new kind of pour depressor. 研究表明，該共聚物對某些含蠟原油有很好的降凝作用，是一種新型的原油降凝劑。