| http://www.w3.org/ns/prov#value | - In the above formulas, n is a positive integer, and VFLn, VFRn, VRLn and VRRn denote circumferential velocities of the respective left-hand front wheel 20L, right-hand front wheel 20R, left-hand rear wheel 21L, and right-hand rear wheel 21R.
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