| 摘要 |
<p>Rotatable jewelry ring (30) comprises a ring part as an inner ring (31), at least one concentric ring part as an outer ring (32), and at least one roller bearing (34) arranged between the ring parts to support the rotatability of the outer ring about the inner ring. The roller bearing has a ball bearing pair (341, 342). The jewelry ring has devices for protecting the ball bearing pair from impact. Independent claims are also included for the following: (1) Production of a rotatable jewelry ring; and (2) Process for adjusting a jewelry ring by expansion using the above rotatable jewelry ring.</p> |
