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Time standard
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==See also== * [[Atomic clock]] * [[Clock synchronization]] * [[Clock signal]] * [[Epoch (astronomy)]] * [[Frequency standard]] * [[Radio clock]] * [[Time in astronomy]] * [[Time signal]] * [[Time metrology]] * [[Time transfer]] * [[Timekeeping on Mars]] * [[Orbital period#Small body orbiting a central body|Orbital period as unit of time]]
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