| 摘要 |
<p>PURPOSE: A golf ball is provided to give appropriate reduction, spin control, and flight distance by offering good balance to each layer. CONSTITUTION: A golf ball comprises a first layer(204), a second level(206), a third layer(208), and a fourth layer(210). The first layer has a first flexural modulus. The first flexural modulus is bigger than a third flexural modulus. The second level is arranged outside the first layer. A second flexural modulus is bigger than the first flexural modulus. The third layer is arranged outside the second layer. The third layer has the second flexural modulus. The fourth layer is arranged outside the third layer. The fourth layer has the third flexural modulus.</p> |
