Operation & all inclusive comp. mtce. of Microprocessor based HVAC machines with capacity of 5 x 100 TR (3 Nos. of 100 TR Chilling machines with reciprocating compressor & air cooled condenser and 2 Nos. 100 TR chilling machines with screw compressor and Air cooled condenser) for Bharat Sanchar Bhawan at H.C Mathur Lane, Janpath, New Delhi (EXPIRED)