How can a stubborn "ratchet" that can only turn in one direction become a universal wrench?

The ancient navigational tool "Sextant" is still in use today! Do you know how it works?

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Do you have the strength to compete with me on Metro Line 3?

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[Gouji Toy Appraisal] Toys from the underworld? Popular toy video identification on the Internet 1

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Some not-so-cold knowledge in Genshin Impact [Issue 17]

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The Intersting Reaction of Silver

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A lock with hidden secrets

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Build Most Amazing Simple Underground Temple Living of the King

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The Versatile Excavator

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Candle Production Process

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Incest, but not completely

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I guarantee you've never heard these life hacks before

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Starting with just an iron chain, relying entirely on pulling throughout the whole process #Log Grap

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Can ice bullets really withstand the high temperature of gunpowder and become invisible after being

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Harmonic Drive Reducer

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Speed bumps!! A mechanical marvel men can't resist~

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Thanks, master, you really have a wild imagination! It's better to have a clever mind than just brut

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Why do sprinkler heads keep knocking when irrigating farmland? #Science #Decompression #Irrigation #

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The brake pads of a 10,000-ton ship are excavators??!!

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What if screws are rusted and can't be removed? Here's the solution—let's learn it together!

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If you often watch videos, you don’t know how terrible the job of a porn appraiser is!

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