Gem Bids For Inlet Expansion Joint Non-Metallic, For 860 Mm Dia.Si. Psc-05 Purge Air Fan, Drg. No. : Sketch No. 24, Outlet Expansion Joint Non-Metallic, For 860 Mmdia. Si. Psc-05 Purge Air Fan, Drg. No. : Sketch No. 2