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Green Wind is composed of wind driven generator and safety alarm system, set in the middle of two tracks. As train running,much of wind power come into being. Wind power generation unit installed on rail will convert wind power to electricity to transmit to the total power grid, supply the power use of railway system.Safety alarm system can monitor train working status real-time.Through its top caution light, this device can promote driving safety.It can be more effective to prevent emergencies such as trains tailgateing, loss signal, road landslides.