Providing And Fixing Of C.I. Foot Valve Size-6 Inch Heavy Duty And G.I/M.S Flange 6 Inch For Operation Of Pump At Coal Face As Well As 32 No. Sump Under Dakra Project, Nk Area./P.E(Enm)/Dbb/Enit/2022-23/03/2022_Ccl_244035_1 (EXPIRED)