随着人们对现代建筑室内环境质量和能源消耗要求的不断提高，供热、通风和空气调节系统变得越来越复杂。

With the increasing demands on indoor environment quality and energy consumption in modern buildings, heating, ventilation, air-conditioning systems become more and more complex.

youdao

随着人们对现代建筑室内环境质量和能源消耗要求的不断提高，供热、通风和空气调节系统变得越来越复杂。

With the increasing demands on indoor environment quality and energy consumption in modern buildings, heating, ventilation, air-conditioning systems become more and more complex.

youdao