an extrusion screw keyed on {HEAD ~ the driving shaft} to rotate in {TAIL ~ said sleeve element}, 
to rotate in
an extrusion screw keyed on { HEAD ~ the driving shaft } to rotate in { TAIL ~ said sleeve element } ,
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH