added.Continuous working temperature is between 60 ° and 70 °.These kinds of guardrails are usually installed on the ramp, continuous downhill and curved road of the expressway. When a vehicle hits a guardrail, the rotation
vehicle and the driver, and play a good protective role.There is a reflective strip on the rotating cylinder, and the evening star
stone can reflect the outline of the route better through the light irradiation, which can play a good line of sight induction
effect on the vehicle and further guarantee the safety of the vehicle.