Carrying Out Operation And Maintenance Including Watch And Ward, Housekeeping And Gardening, Mrt Assistance And Assistance For Telecom Of E.H.T Sub-Stations And Lines And Cbd And Sm Gangs For Lines And Sub-Stations On Works Contract Basis Pertaining To 220Kv & Above Sub-Stations Pertaining To O And M Circle Guntur In Vijayawada Zone For The Period Of Three Years From The Date Of Awarding Of Work. Work-1 For 220Kv & Above 400Kv Sub-Stations