Operation And Guarding Of Gaseous Chlorination System At Ohr Site Zone-I Of Jaykrishnapur Under Barjora Block Dist-Bankura Under Bankura-I, Ii And Barjora Block Surface Water Based Piped Water Supply Scheme Under Bankura Mechanical Division, Wbphed/Ee/Bmd/Niet-7 Of 2025-2026/103