單通道熱交換器once: adv. 1.一次,一趟,一回,一遍;一倍。 I sho ...through: The river flows throug ...heat exchanger: 熱交換器。 once through: 直流式heat exchanger; exchanger: 熱交換器下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯