| http://www.w3.org/ns/prov#value | - means operable when the vehicle speed is ascertained by said ascertaining means to be within said low speed range, for outputting a first control signal to control the assisting power in accordance with a first characteristic which nonlinearly varies the assisting power with variations in the steering effort in such a manner as to make the increasing rate of the assisting power larger as the vehi
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