bids are invited for installation for two years operation and maintenance of terminal building e and m , comprehensive maintenance contract for water purifier , comprehensive maintenance contract of 2 tr split ac , comprehensive maintenance contract of 3tr tower ac , dsr item gemarpts searched annual operation and maintenance contract for e and m installation strings used in gemarpts add on gateways and accessories for pabx system, installation and commissioning charges for cctv cameras gemarpts searched (accessories), add on cards and accessories for pabx result generated in gemarpts system, software intelligence system for application development and maintenance low voltage surge protective devices (surge protector relevant panel) as per is 8794, is 12987 electrical safety devices and accessories (insulating mats categories selected for notification for electrical purposes) as per is 15652 annual operation and maintenance contract for e and m total quantity : 79