{HEAD ~ A first planar filter member} is arranged between {TAIL ~ the cover and intermediate members} and a second planar filter member is arranged between the intermediate and base members 
is arranged between
{ HEAD ~ A first planar filter member } is arranged between { TAIL ~ the cover and intermediate members } and a second planar filter member is arranged between the intermediate and base members
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH