Repairing (02 nos.) of Buchholz relay WTI, OTI protective device of 3MVA, 11KV/3.3KV transformer for controlling of Main Patch Pumping of 1-K pit and repairing of 1250KVA, 11KV/3.3KV transformer of Benidih SS AMP Colliery Repairing (02 nos.) of Buchholz relay WTI, OTI protective device of 3MVA, 11KV/3.3KV transformer for controlling of Main Patch Pumping of 1-K pit and repairing of 1250KVA, 11KV/3.3KV transformer of Benidih SS AMP Colliery