{HEAD ~ Each pocket} is formed into a shape forming a narrow opening portion at {TAIL ~ the inner race side} and a wide opening portion at the outer race side 
{ HEAD ~ Each pocket } is formed into a shape forming a narrow opening portion at { TAIL ~ the inner race side } and a wide opening portion at the outer race side
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH