The interesting metal "Bismuth" has an oxide film that can never be scraped off! Why is it still col

The ancient navigational tool "Sextant" is still in use today! Do you know how it works?

lengkepu

1 View

Why do sprinkler heads keep knocking when irrigating farmland? #Science #Decompression #Irrigation #

haoqiwanhuatong

8 Views

As long as you use the right method, work won't be that tiring.

haoyongwujingongju

43 Views

Strong men VS. Strong fish

Shidaolunhuizhijing

3.2K Views

Car Disassembly Video

haoyongwujingongju

42 Views

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

haoqimiaomiaomiaody

18 Views

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

tanmi

22 Views

Why is the blade of a gantry shear angled? #Science #StressRelief #HeavyMachinery #GantryShear #FunF

haoqiwanhuatong

9 Views

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

haoqiwanhuatong

36 Views

Why do rock slabs need to be broken manually? #Science #Unzip #Construction #Cool Knowledge

haoqiwanhuatong

16 Views

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

haoqiwanhuatong

15 Views

Why do we need to install a wellbore when digging a well? #Science #Unzip #IncreaseKnowledge #Diggin

haoqiwanhuatong

9 Views

Comparison of the size of tsunamis in history

Jinzhengmeiyongde

18 Views

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

haoqiwanhuatong

13 Views

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

haoqiwanhuatong

13 Views

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

haoqiwanhuatong

25 Views

Why do we add a layer of metal between the hammer head and the wooden handle? #Science #StressRelief

haoqiwanhuatong

9 Views

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

haoyongwujingongju

27 Views

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

yaki1

53 Views

How Tsunamis Are Formed (3D Principle)

Jinzhengmeiyongde

23 Views