National Geographic NG752 SERIES, Инструкция по эксплуатации

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4) Measure of a time by cycle
- Press push button A to start the
chronograph.
- Press push button B to freeze
the display. The chronograph
keeps running. The display
indicates the time elapsed since
the chronograph was first
stopped.
- Press push button B for more
than one second. The
chronograph still runs, but the
elapsed time is reset.
- Press push button B to display
the new elapsed time.
- Press push button A to stop the
chronograph.
D A
C
B
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