Gem Bids For Inlet Expansion Joint Non-metallic, For 2175 Mm Dia. Di. Bcb-24 Id Fan, Drg. No. : Sketch No. 24173c-1, Outlet Expansion Joint Non-metallic, For 2175 Mm Dia. Di. Bcb-24 Id Fan, Drg. No. : Sketch No. 24173c-