{TAIL ~ The flanged portion} 15c is provided at the outer circumference of {HEAD ~ the body portion} 15a 
{ TAIL ~ The flanged portion } 15c is provided at the outer circumference of { HEAD ~ the body portion } 15a
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH