Annual Maintenance Contract Of Sewerage Network In Areas Of Marripalem Vuda Layout, Karasa, Santhi Nagar, R.P Peta, Gavara Kancharapalem, Thummadapalem Including All Jnnurm Colonies In Ward No.S 52, 56P & 57 Under West Constituency In Ae(Ws&S)-19&20 Sections In Gvmc, Visakhapatnam For The Year 2026-27