| 摘要 |
PURPOSE: A golf ball is provided, in which a tapered insertion hole is penetrated in the center and fluorescent rod passes. CONSTITUTION: A golf ball comprises: a body(1) in which a concavo-convex region is formed in the outer surface; a tapered insertion hole(2) formed to be penetrated in the central part of the body; and a transparent fluorescent bar(3) in which the fluorescent liquid is accepted thereinside. The body and fluorescent bar are transparent, refract radiation of the fluorescence liquid and facilitate discrimination of a ball in night time.
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