The calculations of barrel panels and panel space of the double barrel panels heat interchanger are discussed.Some problems which should be paid attention to are put forward in this paper.是什么意思_The calculations of barrel panels and panel space of the double barrel panels heat interchanger are discussed.Some problems which should be paid attention to are put forward in this paper.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句