Labour Charges for Upkeeping of Mills at higher elevation, attending coal powder leaks, minor welding works , adjustment of ring roll settings , cleaning and clearing of coal rejects , dust at Dynamic classifier area and Mills bay area and Lube oil system in regular maintenance of Boiler Mills sub-division , 800MW Unit during the period from 22.11.2026 or from actual date of commencement of work to 31.03.2027.