As the rod moves in the direction of {TAIL ~ the secondary extrudate} 42 it contacts the primary extrudate 41 and thereafter causes the primary extrudate to move toward {HEAD ~ the secondary extrudate} 
As the rod moves in the direction of { TAIL ~ the secondary extrudate } 42 it contacts the primary extrudate 41 and thereafter causes the primary extrudate to move toward { HEAD ~ the secondary extrudate }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD