| 摘要 |
The mechanism has a driving unit (3) with catch pins (3a, 3b) coupling a path of teeth of a date mobile (1) and a plane wheel (11), respectively. The wheel (11) is connected to a fixed wheel (9) by a planet wheel (10). Number of teeth of the wheel (9) is selected so that one of five teeth of wheel (11) is aligned with a rotational axis of the wheel (9), wheels (10, 11), driving unit, mobile and 30 of each month having less than 31 days.
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