| http://www.w3.org/ns/prov#value | - y to move from a side area of said cavity remote from said outlet to and through said outlet, said base including an elevated plate having a through passage forming said inlet, said inlet being bridged by an intake valve comprising a cup-like base which has a plurality of apertures and an overlaid flapper means having a central connection to said cup-like base and positioning the relatively free p
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