As shown in FIG 2 b, {HEAD ~ the edge} wrapped {TAIL ~ lines} 36 therefore have a rounded shape like a semi circle 
wrapped
As shown in FIG 2 b , { HEAD ~ the edge } wrapped { TAIL ~ lines } 36 therefore have a rounded shape like a semi circle
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH