{TAIL ~ Ends} of these individual fibers separated by melting retract automatically into {HEAD ~ the marginal areas} of the holes so that neater holes can be produced continuously in this fashion by using water needling 
{ TAIL ~ Ends } of these individual fibers separated by melting retract automatically into { HEAD ~ the marginal areas } of the holes so that neater holes can be produced continuously in this fashion by using water needling
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH