How do self-winding watches work?
BrainStuff - Podcast autorstwa iHeartPodcasts
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Self-winding watches keep the time with the help of a piece of metal, gravity and the natural movement of your arm. Tune in to learn more about self-winding watches in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com
