A planetary gear mechanism combines the rotational drive force of a first shaft rotationally driven by a first rotary electric machine and {TAIL ~ the rotational drive force} of a second shaft rotationally driven by {HEAD ~ a second rotary electric machine} and transmits the combined rotational drive force to a drive shaft with the rotational speed increased 
A planetary gear mechanism combines the rotational drive force of a first shaft rotationally driven by a first rotary electric machine and { TAIL ~ the rotational drive force } of a second shaft rotationally driven by { HEAD ~ a second rotary electric machine } and transmits the combined rotational drive force to a drive shaft with the rotational speed increased
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH