Gem Bids For Fabrication And Erection Of Conical Portion At Ash Collecting Tower , Fabrication Of Tail Pipe Installed At Ash Collecting Tower , Barricading Work By Ms Plate At Eco Hopper At Unit 11 And Strengthening Work Of Eco Platform In Unit 9 And 10. , Interconnection Of Vacuum Line Of Unit 11 To Unit 10 , Strengthening Of Seal Box Of 9b By Channel And Beam Support At Ash Collecting Tower Unit 9. , Erection Of 6 Inch Or 8 Inch M.s. Pipe From Awrs Intermediate Sump Pit To Ash Dam