Biennial Contract For Radiography Other Ndt Job And Stress Relieving Of Boiler Pressure Parts During Om Short Shut Down Period During Duct Interconnection Work Between Aph Outlets Of Unit3 4 2x210 M W Btps And U5 6 2x250mw Ctps Ptpp Radiography Other Ndt Job And Stress Relieving Of Boiler Pressure Parts During O M Short Shut Down Period During Duct Interconnection Work Between Aph Outlets Of Unit3 4 2x210 M W Btps And U5 6 2x250mw Ctps Ptpp