an outer sealing member extending from {HEAD ~ ends} of {TAIL ~ the towers} and which covers the two openings, and 
of
an outer sealing member extending from { HEAD ~ ends } of { TAIL ~ the towers } and which covers the two openings , and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH