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Power line inspectors complete test flight

(chinadaily.com.cn) Updated: 2012-11-22 10:36

Power line inspectors complete test flight

Researchers from the State Grid Corp of China examine a power transmission line inspection drone in Northwest China's Qinghai province on Nov 21, 2012. The drones conducted test flights in a high altitude area of 4,500 meters in Qinghai province several days ago. [Photo/Xinhua] 

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