a ring gear to which {HEAD ~ a rotational drive force} of {TAIL ~ the first power transmitting mechanism} is transmitted, 
a ring gear to which { HEAD ~ a rotational drive force } of { TAIL ~ the first power transmitting mechanism } is transmitted ,
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH