maintenance of electronic installation & fans i/c repair maintenance of water pump, sub-station, automatic fire alarm system i/c stair case light in residential building and non-residential building, national library i/c security light, boundary light & e.i. service of service building in national library campus, kolkata during 2025-26. r.m.o. of central packaged type ac plant, wtac, split type ac water coolers and water softening/iron removal, filtration plant at national library, kolkata during the year 2025-26. (sh: providing services for day to day maintenance of ei in residential, old annexe, new annexe, belvedere building, all external electrical installation, operation of pump sets and assistance of wc staff in operation of ac plant & operation of 2 nos. passenger lift.)