{TAIL ~ A method} 1, wherein the length of the fiber ends released by the action of {HEAD ~ said external force} is at least 3 mm 
{ TAIL ~ A method } 1 , wherein the length of the fiber ends released by the action of { HEAD ~ said external force } is at least 3 mm
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH