Datang: I was exposed by Princess Changle

Lin Xuan said with a firm face.

As soon as this word comes out.

There was an uproar!

knowledge is power? !

Changsun Wuji's eyes stared straight.

Even Li Shimin was a little confused.

"Principal Lin, don't speak big words."

Someone chuckled and teased.

"I never boast."

Lin Xuan spoke confidently.

Ma Zhou was dressed in Tsing Yi and stood behind with a mysterious smile on his face.

"I do not believe!"

"If Cheng Huaimo can lift this cauldron with one hand, I can eat this cauldron on the spot!"

Chai Lingwu was very unconvinced!

Immediately stated that he wanted to have a trip on the spot, and be a broadcaster.

Old iron, nothing wrong!

Not only Chai Lingwu, but others also stood up.

"Eating tripod +1!"

"Eating tripod +2!"

Yuchi Jingde was even more straightforward.

Let it all go, old man!

He was able to lift the cauldron with one hand, and the old man ate the cauldron by himself!

Never break your word!

it is good!

Lin Xuan wrote down the names one by one.

Forget it, this cauldron should be enough for them to eat for a few days.

Lin Xuan snapped his fingers again.

Then, someone helped push a crane over.

This crane is very kind.

It is made of solid wood surrounded by several people, and it weighs more than 1000 kilograms.

A hemp rope as thick as a wrist hangs down from above.

This is a pulley block.

The specific principle will not be mentioned.

Not only can the direction of the force be changed, but also the force can be saved.

According to the formula, it should be able to use only 1/20 of the power.

Of course, this is the case without calculating friction.

In fact, there are records of pulleys in the "Mojing" as early as possible.

Both fixed and movable pulleys are available.

However, there are no combined pulley blocks.

Only when the pulley block is developed can it be regarded as a real pulley.

In later generations, pulley blocks were widely used in machinery such as cranes, winches, and elevators.

After Lin Xuan's guidance, Ma Zhou was finally developed not long ago.

And, many tests were done.

It can be sure that it will be of great use in the future!

Everyone was looking forward to it, staring intently.

Li Shimin frowned, puzzled.

He didn't understand what tricks Lin Xuan was playing.

After making sure that the ropes were all tied up, Lin Xuan handed the other end of the rope to Cheng Huaimo.

Cheng Huaimo took a deep breath.

Nod firmly.

Chai Lingwu's body tensed up.

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Chapter 213 Knowledge is power!

This is a moment related to his live broadcast!

In front of so many people in the school, it proved that what Lin Xuan said was empty talk!

A slap in the face of principal Lin Xuan!

It's really cool!

Awesome!

Crunch!

Crunch!