| http://www.w3.org/ns/prov#value | - The two-piece solid golf balls, of which the performances, such as flight distance (rebound characteristics), durability, shot feel,controllability are improved by adjusting a hardness and hardness distribution of the core to a proper range, have been proposed in, for example, Japanese Patent Kokoku Publication Nos. 21426/1986, 44302/1993, 98206/1996, Japanese Patent KokaiPublication Nos. 182278/1
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