Design, Supply, Erection, Testing &Amp Commissioning Of 1 X25 Kv, 50 Hz, Single Phase, Traction Over Head Equipment, Switching Station, Scada, Pole Mounted Ssp, Including Ohe In Tunnels And Other Associated Works Between Section Bhanupalli Dharot 20 Rkm / 37 Tkm Of Ambala Division In Northern Railway In The State Of Punjab And Himachal, India