{TAIL ~ The rod} moves the primary extrudate 41 until the extrudate 41 either contacts and thereafter bonds, or comes in close proximity, with the secondary extrudate whereafter {HEAD ~ the rod} returns to its original position 
{ TAIL ~ The rod } moves the primary extrudate 41 until the extrudate 41 either contacts and thereafter bonds , or comes in close proximity , with the secondary extrudate whereafter { HEAD ~ the rod } returns to its original position
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 OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH