| 摘要 |
A clock and two elapsed time meters are incorporated in the same instrument and driven from a common electronic time base oscillator. The time of day is indicated by a set of digital read-out drums located above the center of a circular dial, while long term cumulative elapsed time is indicated by another digital drum read-out located below the center of the dial. At the periphery of the dial is a circular scale representing short term cumulative elapsed time, which is swept by a peripheral minute indicator as well as a sweep second hand, both of which are designed not to interfere with the digital displays.
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