{TAIL ~ The method} 1, wherein {HEAD ~ the inner layer} and the outer layer each defines a thin skin 
{ TAIL ~ The method } 1 , wherein { HEAD ~ the inner layer } and the outer layer each defines a thin skin
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH