| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 3,942,962 discloses a Venturi element with the Venturi inlet portion extending into the interior of the filter element.The invention relates to polymeric compositions with improved properties that can be used in a variety of applications including the formation of fibers, microfibers, nanofibers, fiber webs, fibrous mats, permeable structures such as membranes,coatings or films.
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