triennial comprehensive & preventive maintenance of different types of unitary air-conditioning machines installed at baghajatin state general hospital, jadavpur, kolkata.- 1 triennial comprehensive & preventive maintenanceof split/ window type air-conditioning machine of different capacity by deputing manpower as per terms & conditions attached. 2 1st year 3 2nd year 4 3rd year 5 charges for providing semi-skilled worker (ac mechanic) having sound knowledge and experience in operation/maintenance /troubleshooting of all type ac machines in the following shift per day on all days incl. holidays [general shift: 09:00 am to 05:00 pm = 1 no., 6 rate should be quotatedinclusive of lwc,gst and all other related related taxes & duties 7 details of ac machines & locations attached in annexure - i.