| 摘要 |
The tri-axial tourbillon comprises a cage (A) containing the balance ( 1 ), the escape wheel ( 2 ) and the escape pinion ( 3 ) rotating around an axis (A 1 ) and mounted in a second cage (B) rotating around an axis (A 2 ), the cage (B) in turn being mounted rotably in a third cage (C) rotating around an axis (A 3 ) that is fixed relative to the timepiece, the three axes (A 1 , A 2 , A 3 ) being perpendicular to each other.
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