The balls are seated in each race, and oil is supplied to {HEAD ~ the inside} of {TAIL ~ each race} through a hole formed thereon 
of
The balls are seated in each race , and oil is supplied to { HEAD ~ the inside } of { TAIL ~ each race } through a hole formed thereon
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH