The extrusion die 17 is used in conjunction with {HEAD ~ an extrusion punch} 18 having {TAIL ~ a spherically shaped protrusion} 19 
having
The extrusion die 17 is used in conjunction with { HEAD ~ an extrusion punch } 18 having { TAIL ~ a spherically shaped protrusion } 19
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH