Depropanization is a procedure in the separation section of ethylene production and its effect is to separate component C3 from component C4 and C4 above.是什么意思_Depropanization is a procedure in the separation section of ethylene production and its effect is to separate component C3 from component C4 and C4 above.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句