?封闭通风
... 封闭式 enclosed type 封闭通风 enclosed ventilation 全封闭 enclosed, totally ...
全封闭通风
封闭式自通风
闭路强迫通风
Instead of ventilation grates that allow rainwater to pour in, the new stations will be aired using enclosed cooling plants.
NPR: New York Expanding Nation's Biggest Transit Hub
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