The effectiveness of pour depressing depends on the constituent of crude oil,such as wax,distribution of wax carbon number,resin and asphaltene.是什么意思_The effectiveness of pour depressing depends on the constituent of crude oil,such as wax,distribution of wax carbon number,resin and asphaltene.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句