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