Limited Tender For Maintenance And Repair Work In Patna Sa- Brick Masonry Works, Supplying , Erecting And Fixing In Position Pre- Fabricated Steel Structures At All Elevations For Canopy Using Structural Steel Sections Ismb/Ismc/Isa Conforming To Is:2062 , Including Cutting, Welding Or Bolting, Supply Of Bolts/Nuts/Washers Etc