The female die has a cavity, {HEAD ~ whose wall} has a bottom portion and {TAIL ~ a top portion} 
has
The female die has a cavity , { HEAD ~ whose wall } has a bottom portion and { TAIL ~ a top portion }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL