| http://www.w3.org/ns/prov#value | - For example, in Japanese Patent Kokai publication Nos. 220889/1988, 98949/1994, 194732/1995 and the like, a two-piece solid golf ball, of which performances, such as flight distance (rebound characteristics), durability, shot feel and controllability are improved by mainly adjusting hardness or hardness distribution of the core to a proper range, is suggested.
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