Work Of Rate Contract For Aoh/Coh/Rsd-For The Work Of Removal Or Eroded Duct Pieces, Repair/Rectification Of Various-Hot Primary / Secondary Air & Cold Air Duct, Flue Gas Duct From Eco Outlet To Id Fan Out Duct And Surrounding Duct Structure/ Support Of 210 Mw Unit No. 4, 5, 6 & 7 At Wanakbori Tps.