In {TAIL ~ addition}, {HEAD ~ the pocket inner surface} of 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 
In
In { TAIL ~ addition } , { HEAD ~ the pocket inner surface } of 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
REL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH