特殊用法accessory airspace1.副气室holding pattern airspace1.(着陆)等待空域horizontal airspace1.水平空域(空域水平宽度)lower airspace1.下层空域navigable airspace1.通航[领航]空域national airspace1.领空restricted airspace1.空中禁区terminal airspace1.机场[航空站]空域upper airspace1.上层空域vertical airspace1.垂直空域(空域垂直距离)