{TAIL ~ An outer edge portion} 7 is integrally formed with a radially outside portion of the end plate 5 so as to surround {HEAD ~ the wrap portion} 6 
{ TAIL ~ An outer edge portion } 7 is integrally formed with a radially outside portion of the end plate 5 so as to surround { HEAD ~ the wrap portion } 6
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH