Is a rooftop infinity pool really safe? "Expand your knowledge" "Fun facts" "Science普及" "Lao Tie Kno

sat 6

sereh_wangi

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The power of science

haoyongwujingongju

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20 common mechanical transmission structures, I'm exhausted

Jinzhengmeiyongde

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Comparison of the size of tsunamis in history

Jinzhengmeiyongde

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How to lay a qualified asphalt road? #Science #Unzip #Paving #Knowledge

haoqiwanhuatong

26 Views

What kind of wisdom did the ancients have to design such a sophisticated mechanism?

haoyongwujingongju

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I advise you to quit porn (enlarging testicles)

xuetudexin-

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Water will flow uphill

haoyongwujingongju

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The foreigner's giant plow tractor actually has a cab from the last century!

haoqimiaomiaomiaody

23 Views

Decompression video of the workers series!

jixiepangke

36 Views

Yemen is the first country to be destroyed by drugs, even children are not spared. How tragic is it?

tanmi

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Unboxing video!! The irresistible charm of machinery

jixiepangke

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

jixiepangke

28 Views

How Tsunamis Are Formed (3D Principle)

Jinzhengmeiyongde

24 Views

Super cool mechanical series of speed bumps!

jixiepangke

36 Views

Super cool mechanical series of speed bumps!

jixiepangke

10 Views

Where do mosquitoes lay their eggs?

Jinzhengmeiyongde

10 Views

Speed bump!! Amazing machinery~

jixiepangke

19 Views

The Fertilization Process of Sperm and Egg

Jinzhengmeiyongde

10 Views

Why don’t civilian aircraft spray flames? The working principle of turbofan jet engines

Jinzhengmeiyongde

18 Views