Supply And Erection Of Upvc Pipes, Water Spray Nozzles, Drift Eliminators And V-Bar With Ss Weld Mesh For St-I Ndct At Ntpc Simhadri Sne Of Upvc Pipes, Water Spray Nozzles, Drift Eliminator And V Bar With Ss Weld Mesh For St1 Ndct Ntpc Simhadri