Many materials will generate high temperatures, turn red, or turn black after friction.

With this skill, you can’t even graduate in Shandong.

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Gear Reducer

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The master remained calm and collected, even lighting a cigarette.

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Just pop it in the freezer—it slides right in!

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A printing press from the Sacramento History Museum

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Repairing airplanes and cars look pretty much the same.

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The Magical World

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Full-process hand-held production to paper bag forming machine

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When it comes to true strength, even a steel-plated hunchback is just fleeting nonsense.

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19th-century German craftsmanship. The principle of the Reuleaux triangle—still haven’t figured it o

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I just love devices that start off sluggish and lifeless but then kick into high gear later on!

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Construction sites are so advanced now—I want to work on one too!

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A one-minute video with four or five violations, including serious rule-breaking.

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Skilled Worker of the “Men’s Speed Bump”

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I thought it was a Dongfeng missile, but it was actually a Dongfeng tractor.

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This thing is really weird: if you step on it with full intention, it won’t fall; but if you ignore

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Can’t the meat-mincing machine work without human heads?

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With just this much traffic, the power company’s laughing while the oil company’s crying.

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From Abalone Farm to Your Table: Harvesting Abalone for a Bowl of Fresh Abalone Porridge

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The AI team was utterly defeated

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