a body for being mounted to said container around said container opening and defining an access aperture for {HEAD ~ access} to {TAIL ~ said container opening} 
to
a body for being mounted to said container around said container opening and defining an access aperture for { HEAD ~ access } to { TAIL ~ said container opening }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL