A system for introducing air into a slurry in a flue gas desulphurization process includes a stationary lance and an impeller. The lance include an outlet portion and a vane assembly. The outlet directs air away from the impeller. The vane assembly may produce turbulence and may convert a portion of the swirling flow from the impeller into longitudinal flow.

 
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> Device and system for anchoring tissue to bone

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