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UAV applied to combat smog in Harbin (3/4)

2014-10-23 10:00 Ecns.cn Web Editor:Yao Lan
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Workers of environmental protection department prepare to fly an unmanned aerial vehicle which is designed to monitor illegal straw burning in Harbin, Heilongjiang province on October 22, 2014. [Photo: China News Service/ Wang Dongliang]
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