A retracting force applied to {HEAD ~ the engaging means} to dispense a predetermined length of fabric by controlling {TAIL ~ the revolutions} of the pincer rolls 
by controlling
A retracting force applied to { HEAD ~ the engaging means } to dispense a predetermined length of fabric by controlling { TAIL ~ the revolutions } of the pincer rolls
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH