National Physical Laboratory - Truetime/NPL Phoneclock

National Physical Laboratory - Truetime/NPL Phoneclock
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Details of National Physical Laboratory - Truetime/NPL Phoneclock

About National Physical Laboratory - Truetime/NPL Phoneclock
National Physical Laboratory - Truetime/NPL Phoneclock- Synchronization to UK time by telephone. This is the UK's national measurement laboratory.
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