In addition, {HEAD ~ the pocket inner surface} of {TAIL ~ the retainer} of the transmission apparatus is formed in a curved surface surrounding a peripheral portion of a ball housed in a pocket, thus allowing easy and accurate formation of pockets 
of
In addition , { HEAD ~ the pocket inner surface } of { TAIL ~ the retainer } of the transmission apparatus is formed in a curved surface surrounding a peripheral portion of a ball housed in a pocket , thus allowing easy and accurate formation of pockets
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH