Annual Maintenance Contract Of Gi And Hdpe Distribution Pipeline Network Covering Wards Nos.43 To 48 And 54 To 56 And Supply & Delivery Of Pipeline Materials, Specials, Valves And Tools Various Diameters For Maintenance Of Water Supply Distribution System Under Ae(Ws&S)-18 Section In Gvmc, Visakhapatnam For The Year 2025-2026.