Gem Bids For Inlet Expansion Joint Non-metallic, For 1755 Mmdia. Si. Bab-65/2 Booster Fan, Drg. No. : Sketch No. 2, Outlet Expansion Joint Non-metallic, For 1755 Mmdia. Si. Bab-65/2 Booster Fan, Drg. No. : Sketch No.