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