Unmanned aerial helicopter with real-time video shootingUnmanned aerial helicopter with real-time video shooting
Night is the best time for a book. alarm clock and candleNight is the best time for a book. Alarm clock and candle
The refueller refuels two helicopters in the air at the same timeThe refueller refuels two helicopters in the air at the same time
The hands of an old clock stopped at a certain timeThe hands of an old clock stopped at a certain time