In this paper, the preparation process of petroleum sulfonates was studied making of Daqing distillate oil as feedstock and oleum as sulfonated agent .是什么意思_In this paper, the preparation process of petroleum sulfonates was studied making of Daqing distillate oil as feedstock and oleum as sulfonated agent .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句