{HEAD ~ The movement} of the strip of fasteners along the guide is caused by {TAIL ~ advancing elements} engaging the side surfaces of the strip of fasteners, and the advancing elements are pulled toward the drive element on each cycle of operation of the drive element of the fastening machine 
is caused by
{ HEAD ~ The movement } of the strip of fasteners along the guide is caused by { TAIL ~ advancing elements } engaging the side surfaces of the strip of fasteners , and the advancing elements are pulled toward the drive element on each cycle of operation of the drive element of the fastening machine
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH