| 摘要 |
<p>The dynamic axis of a sphere (11), e.g. golf ball, is located by spinning the sphere (11) at high speed while it is supported on a low friction-bearing surface (30), thus allowing the desired stable axis to align itself with the spin axis. Markings (62) indicative of the location of the stable axis are applied to the sphere. The spinning operation also indicates the degree of existing eccentricities in the sphere.</p> |
