The undercut groove 323 is coplanar with the bottom surface of {TAIL ~ the race} 320 and extends {HEAD ~ a depth “DG}” into the transverse side wall 321 b 
The undercut groove 323 is coplanar with the bottom surface of { TAIL ~ the race } 320 and extends { HEAD ~ a depth “ DG } ” into the transverse side wall 321 b
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH