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