为了保证安全通风，应该安装有上旋通风装置的窗户，通风不好的房间应该安装新风换气装置。
To ensure safety ventilation, it should be installed on the Windows of rotary ventilation devices, poor ventilation in a room should be the installation of a new air ventilation devices.
它克服了现有火车通风装置换气量小的缺点，改善了列车内部的温度和空气环境。
The utility model overcomes the shortcoming that the ventilation volume of the ventilator of the existing train is small, and the temperature and air environment in the train can be improved.
它克服了现有火车通风装置换气量小的缺点，改善了列车内部的温度和空气环境。
The utility model overcomes the shortcoming that the ventilation volume of the ventilator of the existing train is small, and the temperature and air environment in the train can be improved.
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