{TAIL ~ A spiral wrap portion} 6 is provided on the end plate 5 so as to project axially from the surface of {HEAD ~ the end plate} 5 
{ TAIL ~ A spiral wrap portion } 6 is provided on the end plate 5 so as to project axially from the surface of { HEAD ~ the end plate } 5
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH