| http://www.w3.org/ns/prov#value | - Because air is sparged between fibers in such a manner as to have bubbles contact essentially the entire surface of each fiber which is continuously awash with bubbles while the fibers are vertical, the air is in contact with the surfaces of the fibers longer than if they were arcuate, and the air is used most effectively to maintain a high flux for a longer period of time than would otherwise be
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