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皇冠体育app to use drones for marine surveillance

(Xinhua) Updated: 2012-09-24 06:33

 

皇冠体育app to use drones for marine surveillance

A unmanned surveillance helicopter flies over a group of spectators during a demonstration flight in Lianyungang, a coastal city in East 皇冠体育app's Jiangsu province on Sept 23, 2012.[Photo/Xinhua]


皇冠体育app to use drones for marine surveillance

Staff workers make the preparation for a drone's demonstration flight in Lianyungang, a coastal city in East 皇冠体育app's Jiangsu province on Sept 23, 2012. [Photo/Xinhua]

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