| 摘要 |
<p>The hairspring has a peripheral exterior curve (10) situated in a plane of the hairspring and has a specific rigidity, such that a central part (14) of a curve-hairspring assembly is constituted of concentric displacements during its oscillation. The curve presents elbows (16-18) for centering a central part of the assembly during the assembly operation in a watch movement.</p> |
