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