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A brief introduction to the timer
- Apr 19, 2018 -

The earliest timed tool used by human beings was an hourglass or a water leak. However, after the development of the watch was mature, people began to try to use this new timing tool to improve the timer and achieve accurate time control. The timer is indeed an amazing invention that makes it a lot easier to get people to control time. People have even used timers in the military to make time bombs and detonators. Many home appliances now have timers to control the switch or working hours.

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