Tender For operation and maintenance of dg sets 3 x 60 tr air cooled scroll chiller plant sub stations passenger lift fire alarm system and wet riser system at passport office marripalem visakhapatnam for the year 2024 25 sh providing services for operation and maintenance of iei and fans substation fire alarm system fire fighting system annual maintenance contract of dg sets operation of lifts sw providing pump panel led fittings and 55 inch led commercial display including other miscellaneous works at passport office marripalem visakhapatnamsubwork/packages:providing pump panel led fittings and 55 inch led commercial display including other miscellaneous works at passport office marripalem visakhapatnam