Air valve
排空气阀
风门调节阀
空气阀
气动阀
放气阀
控气阀
进出气阀
空气凡耳
活瓣
气阀
气门
风速
风门
阀
空气瓣
automatic supplementary air valve
high-pressure air valve
numerical control air valve
Air Leakage Rate of Air Preheater
air to air heat recovery unit
air to air missile launching envelope