The by products, wax and foots oil, in lube base oil production by solvent dewaxing were normally used as catalytic cracking feedstock.是什么意思_The by products, wax and foots oil, in lube base oil production by solvent dewaxing were normally used as catalytic cracking feedstock.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句