a variable gear ratio mechanism for variably setting a gear ratio defining a pivot angle of steered wheels of the vehicle to {HEAD ~ a steering angle} of {TAIL ~ a steering wheel} of the vehicle 
of
a variable gear ratio mechanism for variably setting a gear ratio defining a pivot angle of steered wheels of the vehicle to { HEAD ~ a steering angle } of { TAIL ~ a steering wheel } of the vehicle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH