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NIST-7
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NIST-7 : ウィキペディア英語版
NIST-7

NIST-7 was the atomic clock used by the United States from 1993 to 1999. The caesium beam clock served as the nation's primary time and frequency standard during that time period, but it has since been replaced with the more accurate NIST-F1, a caesium fountain atomic clock that neither gains nor loses one second in 100 million years.
==External links==

* (National Institute of Standards and Technology )

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「NIST-7」の詳細全文を読む



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