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