A wave generator bearing of the wave generator has a retainer for holding a number of balls which roll between {HEAD ~ the inner and outer races} to be in {TAIL ~ contact} with an inner race and an outer race and to be separated from each other in the circumferential direction 
to be in
A wave generator bearing of the wave generator has a retainer for holding a number of balls which roll between { HEAD ~ the inner and outer races } to be in { TAIL ~ contact } with an inner race and an outer race and to be separated from each other in the circumferential direction
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH