a) Annual comprehensive maintenance for air conditioner at NKDA office 1 & 3 MAR and Utility Building at AA-II, Newtown, Kolkata under NKDA ,(From 01/07/2017 to 30/06/2018). b) Operation of pump, lift & AC Machine and Maintenance of electrical installation including supply of essential spares etc at CB Community market, AAIC, Newtown, (From 01/07/2017 to 30/06/2018). c) Operation & Maintenance of electrical installation and accessories including supply of essential spares etc at Mel