Tender For maintenance of electrical installation and fans including compound light, repair maintenance of water pumping set, d.g. set, substation equipment, window type and split type ac machine etc. at regional controller of mines at cp block, sector-v, salt lake. (sh: providing services for operation of water pump sets, dg set, iei & fans i/c. compound light, ss equipments i/c. switch hears etc. at regional controller of mines at salt lake sector v)