{TAIL ~ The method} 2, wherein {HEAD ~ the width} of the opening portion of the core partition w is changeable 
{ TAIL ~ The method } 2 , wherein { HEAD ~ the width } of the opening portion of the core partition w is changeable
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH