AUTOMATIC DOOR HAMMER

A student shows the work of the draft of the railway door (KA) automatic, on the State University campus of Padang (UNP), Padang, West Sumatra, Monday (1/2). The door broker created students of the Technical Department of Machine, Faculty of Engineering, UNP, it can detect the presence of railways using sensors as far as 2 kilometers from the door bar then will close and open automatically when the train comes and goes. ANTARA PHOTO/Iggoy el Fitra/ama/16

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