Incredible friction welding, put two steel bars together and rotate them, and an interesting phenome

What is a "Koch snowflake"? Why does it have a finite area but an infinite circumference?

lengkepu

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How are such precise molds made?

YouTubejingcaishipin-

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How strong is the force of regular CPR? I feel like my ribs are going to break in the next second.

palmer_collins_03

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Comparison of the size of tsunamis in history

Jinzhengmeiyongde

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When MC upgrades, it becomes more scientific, and the maximum level is beyond my imagination # Minec

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If you picked up a piece of gold, would it be made into such a shining golden knife?

ba___tanshijie

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

d___iezatan

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Nanako really takes her feelings for Shin-chan seriously

labixiaoxintangzi

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I forced Shido to drink it and licked the bottle, he was so excited that he was so excited~~

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A profession that is easily misunderstood - rope bondage master

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Shi Hao: This is the only person I can't beat! How funny!

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Golden Mirror (Golden Mirror Reaction)

og-118

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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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Why is it so difficult to break a chain?

haoqiwanhuatong

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What are "Kent windows"? What are these small round windows in a ship's wheelhouse used for?

lengkepu

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How does the Dujiangyan Irrigation System work? How did this 2,300-year-old water conservancy projec

lengkepu

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The incredible "lawn bubble" is soft when stepped on, but interesting phenomena occur when it is pop

lengkepu

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This is the first time I've seen this kind of lighter! Slide the metal clip to the right and somethi

lengkepu

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What is the "Jello Effect"? Why do fan blades appear distorted when photographed with a camera?

lengkepu

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

haoqiwanhuatong

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