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Wherein Dr. Know-it-all expounds on mechanical watches, crowns, helium release valves (or HRVs, or helium escape valves), and saturation diving. How does a helium release valve work, and why is it useful? Find out how all of these are connected by watching!

If you enjoy more outdoorsy, adventure type videos--like climbing the Matterhorn or trekking to Mount Everest Base camp--and a few product reviews too, please check out our sister channel, Whole Nuts and Donuts, right here: [ Ссылка ]

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