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In the highway car failure, we always need to 100 meters away to place triangular cones,
taking into account their own and the rear driving safety, but in the process of placement,
in case the rear car speed too fast, may put themselves in danger.
so we made a safety warning aircraft, in the case of the car emergency.
You can use the aircraft to tell the back of the car to slow down to note the condition of the car in front
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