{TAIL ~ Such an ultrasonic sealing machine} can thus effectively serve as {HEAD ~ a sewing machine} which does not produce any holes 
{ TAIL ~ Such an ultrasonic sealing machine } can thus effectively serve as { HEAD ~ a sewing machine } which does not produce any holes
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH