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