| 摘要 |
<p>The mobile has arms (6) radially extending from a rigid central zone (2) towards a peripheral zone comprising tooth (8), where the mobile is made of metal or alloy, or fragile material such as glass, quartz or silicon. The arms are flexible to allow a weak tangential and/or radial displacement of the tooth. The arms are curved and gradually inflected towards a orientation tangential to the rotation of the mobile, such that the thickness of the arms is decreased and the tooth are constituted by ends of the arms.</p> |
