When the steering wheel is turned, resistance is created by the weight of the car and tire-to-road friction, causing a torsion bar in the rotary valve to deflect.
(the steering wheel; is turned; ) (resistance; is created; by the weight of the car and tire-to-road friction; T:When the steering wheel is turned)
the steering wheel resistance
is turned is created
by the weight of the car and tire-to-road friction T:When the steering wheel is turned