{HEAD ~ The plug} has a plug body with an outer sealing member, a tower, and {TAIL ~ an inner sealing member} 
has
{ HEAD ~ The plug } has a plug body with an outer sealing member , a tower , and { TAIL ~ an inner sealing member }
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL