{HEAD ~ The central through hole} 311 communicates with {TAIL ~ a seamless die cavity} 33 in the body 30 of the inner die 3, a neck 32 is formed between the stop portion 31 and the body 30 
communicates with
{ HEAD ~ The central through hole } 311 communicates with { TAIL ~ a seamless die cavity } 33 in the body 30 of the inner die 3 , a neck 32 is formed between the stop portion 31 and the body 30
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH