{TAIL ~ The ribbon} has a small thickness to prevent obstruction of the elements bordering the top flange and {HEAD ~ the upper surface} of the top flange 
{ TAIL ~ The ribbon } has a small thickness to prevent obstruction of the elements bordering the top flange and { HEAD ~ the upper surface } of the top flange
TAIL TAIL TAIL TAIL TAIL TAIL OTH 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