Nctps I Se Mi Circle Aoh 25 26 Bm Dn Unit Iii Conducting Tube Thickness Survey In 1St Pass Inter Pass Boiler Drum Overhauling And Renewal Of Defective Tubes Drain Lines And Overhaul Of Boiler Drums During Annual Overhaul 2025 26 Nctps I Se Mi Circle Boiler Maintenance Division Annual Overhaul Work For The Year 25 26 Specification No 245 25 26