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