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