The utility model relates to an exhaust duct that prevents head wind, especially to a movable air discharging door type one-way air exhaust device.
本实用新型涉及一种防逆风排风管，特别是涉及一种活动排风门式的单向 排风装置。
A framed opening, as in a wall, door, or window, fitted with fixed or movable horizontal slats for admitting air and light and shedding rain.
固定百叶窗一个有框架的开口处，比如在一堵墙里，门里或窗户里。安装有固定的或活动的水平条板，用来通风、采光、遮雨。
The production line breathes in less amount of air due to being provided with the encloser and movable doors, thereby effectively reducing environment pollution and improving operation environment.
生产线上设置罩壳和移动门，吸气量少，能够有效地减少环境污染、改善工作环境；
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