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Velos Rotors snags $2 million to help its drone helicopter production take off in the market - Tech.eu
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Taiwan unveils close-range helicopter-like drone to keep an eye on threats from mainland China | South China Morning Post
The U.S. Navy Turned Its Drone Helicopter Into a Mine-Detector - War Is Boring
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UK Navy to receive Austrian-made drone helicopter
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Unmanned Helicopter Manufacturers | Helicopter UAVs | Single Rotor Drones
