The most hardcore processing method is "cold drawing", where a round tube goes in and a square tube

What are wind dampers? Why do skyscrapers withstand typhoons? It's all thanks to this thousand-ton i

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[Black Cat] Pokémon Sand Sculpture Cold Knowledge! Who are the heaviest, tallest, lightest and strongest Pokémon?

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How can this happen??

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[Animation]Rules in brothels in ancient China

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It is said that only science fiction fans will climax after watching it.

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[Handicraft] The Reborn of A Decades-year-old German Pencil Sharpener

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Anime|So Many Cars, Let's Build An Amusement Park

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Why can the boomerang fly back

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The ball in the bearing won't fall out, so how did it get in? Read this to solve your years of confu

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The incredible "flowing ring" can climb along the arm against gravity. Do you know the principle?

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The incredible Buffon needle throw: throwing a needle randomly on paper can actually calculate "π"!

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Genius design of seven-segment code! How to design a more concise and beautiful segment code based o

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The incredible "sedimentation phenomenon" makes sewage clear in seconds after being scooped out! Wha

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The headache-inducing “bottle problem”: how do you get the wooden stick out when the bottle mouth is

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Interesting tunnel advertisement. The subway is so fast, how can the video outside the window keep p

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Teach the post-00s and post-90s how to clean various types of shoes in daily life!

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The incredible "dry brewing table", pour tea on the soil, and interesting phenomena will happen!

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The most difficult street game: Cover a big circle with three small circles. Why can't you ever win?

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The incredible James coupler, a piece of train technology that has lasted for over 100 years. Do you

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This incredible "old candle" has been burning for 40 years! How did it first form?

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