System Improvement Project For Survey, Design, Supply, Installation, Commissioning Of 2no. 33/11kv Outdoor Sub-stations With Its Connected 33kv And 11kv Lines At Chamarthikandriga In Sathyavedu Constituency Of Tirupati Circle And Yellanti In Nellore Rural Constituency Of Nellore Circle On Semi - Turnkey Basis Ptr, Dtr And Vcbs Are Dept. Supply Under T And D Improvements 33/11kv Outdoor Substations