The planar faces of the base and cover members adjacent the intermediate member each contain a plurality of {TAIL ~ concentrically spaced circular grooves} and a radial conduit affording communication between the grooves, whereby fluid is distributed across the planar faces of the base and cover members adjacent {HEAD ~ the planar filter members} 
The planar faces of the base and cover members adjacent the intermediate member each contain a plurality of { TAIL ~ concentrically spaced circular grooves } and a radial conduit affording communication between the grooves , whereby fluid is distributed across the planar faces of the base and cover members adjacent { HEAD ~ the planar filter members }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD