UAVs are one of the main industrial aircraft.It is now widely used.In the past, power lines are set up by manpower, especially in mountainous areas, where ropes are put into forest and lakes to set up lines, the working environment is harsh and the risk is high.This model can effectively prevent these problems, can meet a variety of complex terrain and homework between classes.Suitable for night exploration, fire rescue and other applications.The drop line adopts gravity hook design, which has the advantages of high strength structure and light weight.This UAV greatly protects the rights and interests of the people.