In-Situ Machining Of Exciter Rotor Slip Ring Of Gas Turbine Generator-2, Attend High Shaft Vibrations In Hp Front Journal Bearing In Steam Turbine-2 And Generator De Side Bearing Pedestal Replacement By Generator Rotor Thread Out For 130.9 Mw Stg-2 A/Pser-Pur-Pal-S477-22/2022_Bhel_661152_1 (EXPIRED)