The subway track system is a high-risk area where passengers are strictly prohibited from entering. Besides the high-speed running trains, the high voltage electricity present in between is also a fatal danger source. Some people who are not familiar with it may wonder, do the rails carry electricit

The mission of the pantograph is to maintain contact with the overhead contact line to supply power to high-speed trains. It presses against the contact line with a certain pressure to ensure the stability and continuity of power transmission. The contact surface of the pantograph is made of graphit