?闭式回热循环
... 封闭环境，密闭环境 closed environment 封闭式膨胀水箱 closed expansion tank 闭式回热循环 closed feed cycles ...
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。