The rotational drive force of {TAIL ~ the second shaft} in the forward direction is transmitted to the planetary gear mechanism via {HEAD ~ a first one way clutch unit} and a first power transmitting mechanism 
The rotational drive force of { TAIL ~ the second shaft } in the forward direction is transmitted to the planetary gear mechanism via { HEAD ~ a first one way clutch unit } and a first power transmitting mechanism
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH