How did the ancients make fire? Rubbing a steel bar against a stone, an interesting phenomenon occur

Room temperature superconductivity has been officially achieved by a Korean team???

bideerjiedao

0 View

The power of science

haoyongwujingongju

48 Views

How Tsunamis Are Formed (3D Principle)

Jinzhengmeiyongde

22 Views

Why not turn off the water when repairing a pipe? This is called pressure plugging. #Science #Unzip

haoqiwanhuatong

9 Views

Speed bump!! Amazing machinery~

jixiepangke

18 Views

Why can a hatchet easily chop down a tree as thick as a bowl? #Science #Relief #Hatchet #Logging #Tr

haoqiwanhuatong

12 Views

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

haoqiwanhuatong

31 Views

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

haoqiwanhuatong

35 Views

Why do we say that no two pairs of ripped jeans are exactly alike? #Science #Unzip #Jeans #Workers #

haoqiwanhuatong

10 Views

The wisdom of the working people is to change the direction of force to move heavy objects. #Science

haoqiwanhuatong

13 Views

Let's follow Mechanical Punk to explore the irresistible charm of machinery!

jixiepangke

9 Views

Why does the bearing emit "hot air" when installing it? This is the interference fit installation me

haoqiwanhuatong

14 Views

Comparison of the size of tsunamis in history

Jinzhengmeiyongde

17 Views

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

haoyongwujingongju

27 Views

Introduction to Traditional Group Farming Culture in Africa

yaki1

18 Views

Gear machining: Why only a tiny bit of cutting is required? #Science #Unzip #Machinery #ExtremeComfo

haoqiwanhuatong

9 Views

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

haoqiwanhuatong

24 Views

Recording the life of ancient rice in "The Exploitation of the Works of Nature" and realizing the dr

lulei

59 Views

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

haoqimiaomiaomiaody

17 Views

Why doesn't it hurt when a needle is stuck in my finger?

yaki1

53 Views