| http://www.w3.org/ns/prov#value | - Patent US4483076 - Ground contact area measurement device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsMeasurement of the area and shape of contact between a vehicle's wheels orracks and the surface over which it moves is automated by having the vehicle drive over an array of switches connected in a matrix including X and Y conductors.
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