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    National Authorities

    Organizations that establish and measure time precisely

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    • National Time Authorities
      • , Canada, NRC official time
      • , Germany, the national metrology institute
      • , Italy
      • , UK , Time and Frequency 1399彩票app官方下载 Page
      • , UK, MSF Radio Signal
      • - Time and Frequency Division
      • , Time Service Department

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