| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem wherein it cannot be estimated what are the specified advantages and disadvantages latently given by specified estimated design owing to complicated properties of physical interaction between various materials used in a core and layers of a multi-layered golf ball. <P>SOLUTION: This golf ball 1 includes: a core 2; an inner mantle layer 3; an intermediate mantle layer 4; an outer mantle layer 5; and at least one cover layer 6, wherein the core has a PGA compression of under 70, and the core 2/the inner mantle layer 3/the intermediate mantle layer 4 combined construct has a PGA compression of at least 30. <P>COPYRIGHT: (C)2009,JPO&INPIT |
