The treadmill crane is derived from the principle of levers, and the earliest concept drawings are the product of the "utopia" of the ancient Roman architect Vitruves, of course, it is also said that this original drawing was invented by Archimedes.

The earliest prototype concept machine, this prototype machine had only one mast, and the top of the pole was equipped with pulleys, which were held in place by a rope, and the cable pulled through the pulley by a winch was used to lift heavy objects.

Of course, when it comes to the principle of leverage, the ancient Central Plains naturally also had it, not later than the West, and the pre-Qin classic "Ink Classic" was the first to theoretically describe the working characteristics of unequal arm balances.

When he arrived at the king of Yan Zhao, people also tried to use the lever method to weigh the weight of the giant pig, and among the existing unearthed cultural relics, there is also the "Warring States Copper Scale" that can be used as an "unequal arm scale".

Later, on the basis of that prototype design, the treadmill crane appeared.

This kind of primitive treadwheel crane is best used by the ancient Romans, but the prototype, Yu Zai has only heard from his archaeological teammates, and he has seen the drawing, but he has not seen the real thing.

Therefore, at this time, Yu Zai threw this thing out to Ah Hong, just because he felt that since Danzhu's carpentry skills had made leaps and bounds, how could he not design heavy machinery as a big engineer?

"Ah Hong, believe me, as long as you get this thing out, no one in the Central Plains will dare to look down on you, where do those fellows know your ability, they are only staring at the one acre and three points of land in front of them!"

Of course, Yu Zai didn't know what Danzhu meant, if this thing didn't work well, he could only go back to Danyuan to be an idle prince, inherit hundreds of millions of family properties and wait for death, that is, the decadent state in the later period of Danzhu in history.....

Not only was Yao sprayed, after Yao sprayed, even Shun was sprayed, although after Yao died, Shun gave his son to Danzhu, so Shang Jun's children successfully became infected with the attributes of a carpentry master, and they were also very good at singing and dancing......

This thing is actually interesting, when the Fuxi clan was in the lineage, Ge Tian's clan was very good at singing and dancing, until now they are also the big tribes of the Central Plains, and at that time, Ge Tian's clan had a co-lord of the world, and the so-called "Ge Tian's Joy" was written by the emperor.

Co-authoring Ge Tian's singing and dancing is to let the world have fun, Shang Jun sings and dances, Shun feels that this kid has no ability at all....

This is the same situation as Yao being stupid by Danzhu playing chess, and being disheartened when he saw Danzhu engaging in carpentry.

Therefore, it's not that a family doesn't enter the door, but when it comes to Qi, they are very good at coming to things, learning the lessons of Danzhu and Shang Jun, and directly killing Boyi.

And now, Danzhu's mind is full of pictures of this crane!

He was breathing a little fast, this kind of super huge machine, the materials needed must naturally be deified, this must be a basic requirement, otherwise no matter how strong the giant wood is, it is susceptible to huge losses, and the huge gear set and treadwheel almost make Dan Zhu sure that this is the aesthetics he has been looking for!

But the crux of the matter is that this thing .....

"Ah Hong, you have to have the courage to challenge! What the predecessors have not done does does not mean that the future generations will not be able to do it!"

Yu Zai encouraged Danzhu vigorously, and Danzhu held his breath, of course he knew what role this thing would play in the future war.

Levels, fortresses, cranes, boulders.....

"Of course I'm going to make this thing!"

Danzhu's eyes were burning with fire!

"Zai, you've got something amazing.... Thank you for me, that friend. ”

Yu Zai was stunned for a moment, and Dan Zhu picked up the design and walked out to the front, but he didn't take a few steps and stopped, turned his head, and said seriously to Yu Zai:

"This drawing you gave me, the conversation between you and me today, in the future, will change the whole world!"

"The era of giant arm gears and machine workers has arrived!"

Yu Zai stood up suddenly, but he patted his head, Dan Zhu was a little puzzled, but at this time Yu Zai smiled and said:

"Then Ah Hong, please call me that...."

Yu Zai cleared his throat: "Ahem....."

"This is a small step to change the south, but it is a big step to change the entire mountain and sea!"

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Xunshan sent a procurement force to Emperor Yang, and Xunshan was naturally very concerned about the production and testing of the bed crossbow, after all, this is related to the future security, as well as the attitude and role of the south in the eyes of the Central Plains, but Xunshan felt that the people sent out recently seemed to be a little too much.

"Ji Yuan, Ji Bu and they haven't come back yet, the envoys of Ji Li Kingdom have been staying in the Chifang Clan for many days, and they haven't come back from the southwest yet?"

"It can't really be the wrong way!"

Although Ji Ya didn't want to believe this answer, it seemed that this was the situation at the moment, those guys took the map and walked all the way to the southwest, and they were able to turn a fork in the road!

Of course, at this time, Ji Ya didn't know what kind of big people Ji Bu and Ji Yuan had encountered.

In Lingze of Wushan, Wu Pan learned the news of Sanmiao's attack, and Ji Yuan Jibu came out to make them, so he told Wu Pan that Sanmiao's attack was only hitting Storm Mountain now, and there was no further news.

Wu Pan sighed with emotion.

Sanmiao, this is a long-ago tribal alliance.

Wu Pan knew that he was afraid that he would have to leave here, and the war of Sanmiao would inevitably affect here.

Wushan is not a mountain, but a horizontal mountain range, Wushan where Emperor Yan buried his daughter, a group of mountains in the northeast, and also the place where the "Danshan" in Wushan is located.

The warriors of the Xunshan clan hope that this legendary "Ten Witches of Lingshan" can help them defend against the enemy.

The power of Sanmiao is very great, in the era of the Yellow Emperor has been slightly rudimentary, and in the era of the emperor, Sanmiao has been basically formed, in essence, Sanmiao belongs to more than 200 years ago, many defeated tribes of the collection, this collection continues to absorb more defeated, migrating clans, and the local barbarians in the south combined, and finally formed the third largest force in the ancient mountains and seas, that is, the "Miao barbarian group".

In the mountains and seas, the general tribal alliance can be divided into six, aside from the four desolation kings, the tribal alliance refers to the Central Plains, Dongyi, a large, several countries, city-states united by a region, in this region, the rulers are a whole of interests, this is an "alliance".

From the tribe to the alliance, it is an advanced relationship, so ...... It fully shows that there is a reason why the tribe can't beat the alliance.....

Then, the tribal alliance of the mountains and seas is headed by the Central Plains, the Huaxia tribe is a centralized alliance, Dongyi is a parliamentary type, Baiyue is a scattered sand type, the Kunlun three tribes are the chiefdom type, and the northernmost place is the primitive mutual aid association......

And the Miao Man Group should be regarded as a lord's political system?