Annual Preventive Maintenance (Including Pre-Monsoon Maintenance) Of 33Kv Balram Feeder From Nandira Substation To Colony Substation And Mine Main Sub Station At Balram Ocp And 6.6 Kv/3.3 Kv Mine Feeders At Balram Ocp ,(Hingula Area)./Mcl/Ha/Enm/E-Tender/22-23/021/2023_Mcl_276244_1 (EXPIRED)