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atomic time standardA watch that sets its time automatically by receiving radio signals from an extremely accurate atomic clock
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atomic time standardProvided by the United States National Institute of Standards and Technology, Time and Frequency Division, Boulder, Colorado, atomic power. Mechanical movements are accurate within one minute each day [..]
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atomic time standardProvided by the U.S. National Institute of Standards and Technology, Time and Frequency Division in Boulder, Colorado, atomic time is measured through vibrations of atoms in a metal isotope that resem [..]
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