The Elevated Technology of Pantograph

the technology of pantograph, why does the rear pantograph raise always? the working of the pantograph in Hindi or working of the pantograph, how the pantograph is raised, the electric loco rooftop device, up & down movement of the pantograph, pantograph
Welcome to Let's Grow Up हिन्दी, today's video is very very interesting, and this video covers the technology of the pantograph raise, how the pantograph works, the working function of the pantograph and the pantograph control mechanism unit.
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