BEIJING, Dec. 8 (Xinhua) — The China-developed AR-500 unmanned helicopter has been officially listed as maritime management equipment in east China\’s Shandong Province, according to the Aviation Indu
Enjoy life, Inspiring work
Enjoy life, Inspiring work
BEIJING, Dec. 8 (Xinhua) — The China-developed AR-500 unmanned helicopter has been officially listed as maritime management equipment in east China\’s Shandong Province, according to the Aviation Indu