The tray number of atmosphere fractionator is reasonably reduced from 60 to 50 that is firstly used of separation shifting techniques proposed by Univ.是什么意思_The tray number of atmosphere fractionator is reasonably reduced from 60 to 50 that is firstly used of separation shifting techniques proposed by Univ.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句