Pencils can be used to drill wood and create fire—so could a rapidly spinning pencil drill right thr

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Human Speed Bump – Mechanical ~3.26

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Speed Bump Worker Series

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Why do we need to stretch the syrup repeatedly when making handmade candies? This step is actually c

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Why is steel colored after cutting? #Science #Unzip #Metalworking #CoolKnowledge

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Those super cool mechanical series of speed bumps~

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Why do we need to grind off the bark? This is the process of peeling and rounding the wood before pe

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