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中国气象网14d
Meteorological departments conduct a large-scale UAV observation experiment of the Northeast Cold Vortex for the first time - 中国气象局政府门户网站
Photo GalleryAt 5 a.m. on June 19, the sky over Chaoyang City, Liaoning Province, China was overcast with thick clouds. The Haiyan II unmanned aerial vehicle (UAV) flew from Chaoyang Airport to the ...