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Number:
968/847
Name:
Horology
>
Apparatus for measuring unknown time intervals by electric means (timing devices for clocks or watches for comparing the rate of the oscillating member with a standard subclass 769; radar systems, analogous systems g01s 9/00; measuring frequency g01r 23/00; measuring phase angle g01r 25/00) [g04f 10/00]
> By measuring phase [g04f 10/06]
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