The oscillating member is provided on its inner periphery with {HEAD ~ a plurality} of {TAIL ~ clutch teeth} 
The oscillating member is provided on its inner periphery with { HEAD ~ a plurality } of { TAIL ~ clutch teeth }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL