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![Time Service Dept., United States Naval Observatory](https://www.iarticlesnet.com/pub/img/site/s_46.jpeg)
Time Service Dept., United States Naval Observatory
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日期:2024-08-28
The Master Clock for the United States. ... NOTICE TO USERS Under direction of the Chief of Naval Operations, the nature of the Naval Observatory's web sites are changing from their traditional appearance to a portal which combines all of the Navy Oceanog...看更多