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