Nctps I Se Mi Circle Aoh 25 26 Bm Dn Unit Iii Flue Gas Duct B Pass Rectification Of Flue Gas Duct Portions From Aph Outlet To Before Mechanical Hopper Area And Including Expansion Joint During Annual Overhaul For The Year 2025 26 Nctps I Se Mi Circle Boiler Maintenance Division Annual Overhaul Work For The Year 25 26 Specification No 237 25 26