two inner sealing members extending radially outward from the towers each at a location proximate the outer sealing member so as to form {HEAD ~ a space} between {TAIL ~ the inner and outer sealing members}, whereby webs extending into the two openings fit into the space formed between the inner and outer sealing members 
between
two inner sealing members extending radially outward from the towers each at a location proximate the outer sealing member so as to form { HEAD ~ a space } between { TAIL ~ the inner and outer sealing members } , whereby webs extending into the two openings fit into the space formed between the inner and outer sealing members
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 REL TAIL TAIL 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