Ключевые слова: 2 machine, 2 units, aerial view, aircraft, blue sky, camera, copy space, drone, electric, electronics piano electric piano, flight, formation, formation flight, helicopter, hobby, hovering, industrial, leisure, model, more than one, motor, multicopter, near miss, propeller, quad computer, radio control, rc model, recreation, shooting, sky flying camera, small unmanned aerial vehicle, technology, two machines,