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PCE
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CPC Main Group
G04F 7/00

Apparatus for measuring unknown time intervals by non-electric means (using fluidic means G04F13/06)

3 direct subcodes

Child Classifications

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  • G04F 7/02 by measuring the distance of fall or the final velocity of a falling body
  • G04F 7/10 Means used apart from the time-piece for starting or stopping same