Operation & Comprehensive Annual Maintenance Contrat (Amc) Of Electrical Equipments Hvac System, Bms, Lift, Public Address (P.A) System, Cctv Camera System, Smoke Detector With Fire Alarm System, Networking, Solar System Along With Epabx & Audio Visual (A/V) System In Auditorium/Conference Hall, Etc Installed At Bapu Tower Gardanibagh, Patna