| http://www.w3.org/ns/prov#value | - It is preferable that when the radius of the wheel cap is R, the plural fins are formed along the radius except for a portion adjacent to the wheel cap center in which the distance from the wheel cap center is R/20 to R/10 and an outer portion in which the distance from the wheel cap center is 9R/10 to 19R/20 (see FIG. 3).
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