| http://www.w3.org/ns/prov#value | - This improved chock consists briefly of two blocks 1 and 2, one of which is shiftable longitudinally toward the other so that the two blocks may be moved into Wedging engagement with the tire 3 of a wheel #3 and prevent the wheel from rolling forwardly or rearwardly along a street, road, or other highway upon which a vehicle is parked.
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