{HEAD ~ The optional cover} 14 can enclose this edge 60 or {TAIL ~ the edge} 60 can be exposed 
enclose
{ HEAD ~ The optional cover } 14 can enclose this edge 60 or { TAIL ~ the edge } 60 can be exposed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH