There is a cover which closes the end of {HEAD ~ the projection} remote from {TAIL ~ the rim} 
There is a cover which closes the end of { HEAD ~ the projection } remote from { TAIL ~ the rim }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL