The authors put forward at first that operating holdup in packed column is not well-distributed and ratio of height to diameter is an important parameter which influences operating holdup.是什么意思_The authors put forward at first that operating holdup in packed column is not well-distributed and ratio of height to diameter is an important parameter which influences operating holdup.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句