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Post Info TOPIC: Durov Dmitry twin-boom tri tilt-rotor
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Date: Nov 20, 2015
Durov Dmitry twin-boom tri tilt-rotor
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Russian patent RU2502641:

http://www.ntpo.com/izobreteniya-rossiyskoy-federacii/letayuschie-apparaty/38911-bespilotnyy-dvuhfyuzelyazhnyy-vertolet-samolet.html



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