| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a golf club solving discontinuity between wood series and iron series. SOLUTION: The head width A of a head 3 is set in the range from 40 mm to 60 mm, and the face progression B is set in the range from 7 mm to 20 mm. The natural frequency of the golf club in the shaft of the regular class is set in the range from 265 to 285 cycle/min.</p> |
