ducted fan meaning in Chinese

导管风扇
导管式通风机
函道风扇
内外函喷气发动机

The train is propelled by ducted fans
这种火车用涡扇推进器。
In this paper , the major subject investigated is the ducted fan vertical take - off and landing ( vtol ) uav . compared with normal fixed - wing uav , it has so many strong points such as be convenient to take - off and land , good adaptability and long hover time . we analyze and summary information of foreign uavs , then calculate the figure dimension of our uav , and draw the uav structure configuration and the outside view drawing of three dimensional structure
本课题的研究对象是涵道风扇式垂直起落无人机,与一般的固定翼无人机相比,它有着起落方便、适应性强、可以在空中长时间盘旋等优点,本文通过对相关飞行器资料的分析总结,给出了无人机的大体结构尺寸,并画出了无人机的结构布局图和三维结构外观图。