enclosed body

Determination of the minimum fresh air requirement for closed workshops by indoor air cleanness;

运用室内空气清新度确定封闭式车间空调系统最小新风量

Ventilation mode for a closed welding workshop;

封闭式焊接车间通风方式的解决方案

The bounding wall enclosure is mainly adopted by large boilers to protect itself in fire power plant in cold area.

严寒地区，火力发电厂的大型锅炉多采用整体的紧身封闭围护结构予以保护。