A) forming a race containing {HEAD ~ a plurality} of balls and {TAIL ~ a hole}, wherein a burr is formed on the hole protruding outwards 
of
A ) forming a race containing { HEAD ~ a plurality } of balls and { TAIL ~ a hole } , wherein a burr is formed on the hole protruding outwards
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH