| 摘要 |
<p>PURPOSE:To provide the golf ball for water-surface training having a good hitting feel and excellent durability. CONSTITUTION:The golf ball for water-surface training is produced by consisting the golf ball of a core and a cover coating this core, specifying the compression of the core to 2.6 to 4.0mm, using an ionomer resin as the chief material of the cover, coating the core by using the ionomer resin having 1500 to 3000kg/cm<2> bending rigidity, specifying the ball compression to 70 to 95 (PGA system) and specifying the sp.gr. of the ball to >=0.5 and <1.</p> |
