{TAIL ~ The top} of the inner die 3 is processed to form {HEAD ~ a stop portion} 31 with a central through hole 311  
{ TAIL ~ The top } of the inner die 3 is processed to form { HEAD ~ a stop portion } 31 with a central through hole 311
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH