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UAV drone used to monitor water environment in Huzhou, E China's Zhejiang

无人船为河道“体检”

An unmanned aerial vehicle (UAV) is used to monitor the water environment of Ditang water area in Huzhou, east China’s Zhejiang Province, July 30, 2020. (Photo by Lu Zhipeng/Guangming Picture)

[ Editor: SRQ ]