low-head flood discharging structure 低水头泄水建筑物
Liquid discharge head, method for making same, its box and liquid discharging device.
排液头，制造排液头的方法，排液头盒和排液装置。
The invention also provides a droplet discharging device and an inhaler with the discharge head.
本发明还提供了具有这种排放头的液滴排放装置和吸入器。
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。
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