As {HEAD ~ the fabric} lying between gripping lines is tensioned by {TAIL ~ the component} of lateral displacement motion of the gripping elements, the fabric is simultaneously gathered by the component of closing motion 
As { HEAD ~ the fabric } lying between gripping lines is tensioned by { TAIL ~ the component } of lateral displacement motion of the gripping elements , the fabric is simultaneously gathered by the component of closing motion
OTH HEAD HEAD HEAD HEAD HEAD HEAD 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