{HEAD ~ Variable gear ratio mechanism} variably sets a ratio defining a pivot angle of steered wheels of {TAIL ~ the vehicle} to a steering angle of a steering wheel of the vehicle 
{ HEAD ~ Variable gear ratio mechanism } variably sets a ratio defining a pivot angle of steered wheels of { TAIL ~ the vehicle } to a steering angle of a steering wheel of the vehicle
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH