| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce vibration of frequency in a wider range in reducing the vibration of a golf club head by attaching a visco-elastic body. <P>SOLUTION: In the hollow golf club head to which the visco-elastic body is attached, the visco-elastic body is characterized by the composition which is the mixture of a plurality of kinds of visco-elastic materials with different temperature dependency of the loss factor. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
