{HEAD ~ intermediate member means} arranged between {TAIL ~ said cover and base members} to divide said filter chamber into a plurality of filter subchambers, said intermediate member means having planar surfaces arranged adjacent said cover and base member planar surfaces, respectively, a portion of said intermediate member means containing a plurality of segmented circular concentrically spaced throughslots corresponding with said cover and base member circular grooves 
arranged between
{ HEAD ~ intermediate member means } arranged between { TAIL ~ said cover and base members } to divide said filter chamber into a plurality of filter subchambers , said intermediate member means having planar surfaces arranged adjacent said cover and base member planar surfaces , respectively , a portion of said intermediate member means containing a plurality of segmented circular concentrically spaced throughslots corresponding with said cover and base member circular grooves
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