gear wheel

Also known as: cogwheel

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gears

watches

  • tritium watch
    In watch: Electric-powered and electronic watches

    …train by advancing a toothed wheel one tooth. First produced in 1953, the resonance drive type, properly called an electronic watch, is inherently more accurate since it operates at a frequency higher than that customarily used with balance-type watches, and the tuning fork is a fairly stable source of frequency.…

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