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