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The fifth exhibition on unmanned aerial vehicle (UAV) that started in Beijing on July 9 ends on Friday. The UAV, as emerging equipment and technological means, is called "aerial robot". It can be used in military reconnaissance, attack, aerial photo, agriculture and other fields. Starting from 2006, the biennial exhibition has attracted an average of 500 participants, 70 exhibitors and tens of thousands visitors every time. [Photo/IC]