ducted fan短语¹³¹⁶²⁰⁺³ 基本例句 有导流罩的风机,航空内外函喷气发动机,导管风扇 Some unmanned aerial vehicles can vertically take off and land with the ducted fan system, but there is no valid method to analyze the aerodynamic characteristics of a ducted/span> fan system currently. 近几年出现了许多构形新颖的垂直起降无人飞行器,都以涵道风扇作为升力系统。 dictall