Survey, Design, Supply, Installation, Commissioning Of 4No.33/11Kv Semi- Indoor Sub-Stations And 3Nos. 33/11Kv Indoor Sub-Stations With Connected 33Kvand 11Kv Lines In Operation Circles, Tirupati, Kadapa, Sri Sathya Sai And Kurnool On Semi - Turnkey Basis (Ptr And Dtr Are Dept. Supply) With Financial Assistance Of M/S. Rec Ltd., New Delhi