Up keeping and accumulated coal dust cleaning external and internal parts of electrical equipment and accessories such as HT and LT switchgear and motors, lighting fixtures, cable trays along the conveyors , lighting in under/over elevation of Railway Marshaling yard and stacker/reclaimers , BOBR including jungle cutting at yard lighting towers , crushed yard towers and BHEL shed area in DE/EM/CHP/Stage-I, II , III/Dr.NTTPS , during the period from 01-04-2018 to 31-03-2019 for the year 2018-19