- “Carrying Out Operation & Maintenance Including Watch & Ward, Housekeeping & Gardening, Mrt Assistance & Assistance For Telecom Of E.H.T Sub-Stations And Lines And Cbd & Sm Gangs For Lines & Sub-Stations On Works Contract Basis Pertaining To “Cbd Gangs Kondapalli & Nunna And 220Kv Ss Kondapall & Gunadala Colony Pertaining To O&M Circle Vijayawada In Vijayawada Zone” For The Period Of Three Years From The Date Of Awarding Of Work ” Reserved For Sc Bidders