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