pivoted ventilation window 枢转式通风口
ventilation-window opener 开窗机构
controlled ventilation window 可调通风窗
open extent of ventilation window 通风窗开窗幅度
polygonal combination ventilation window 多边形组合式通风天窗
The electric fan on the ventilation window consists of two axial flow blowers which can rotate forwards and backwards.
所述的通风窗口上安装有并排的二只轴 流风机构成的、可正反转的电风扇；
Discusses the verification of the suitability of polygonal combination ventilation window and suggests corrective actions for existing problems.
通过实际应用，检验了多边形组合式通风天窗的适用性和存在的问题，并提出了建议和改进措施。
The electrical ventilation window has the advantages of reasonable and compact structure, easy and reliable operation, good cooling effect, and high safety and practicability.
具有结构合理、紧凑，使用方便、可靠，降温效果明 显，使用效果好，安全实用等特点。
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