Saying that, Zhang Qili quickly stacked two stacks of bricks on the ground, and then used eight bricks to form a semicircle to install a circular arch on these two stacks of bricks, forming an arch, and then Zhang Qili said: "Look, I pressed down the top of this arch, where is the force?" Is it just this brick under my hand? ”

I saw that with the increase of the strength in Zhang Qili's hand, the two stacks of bricks supporting the arched door tilted to both sides, and the two stacks of bricks became more and more crooked under the eyes of everyone, and finally fell down with a 'boom'. Pen&Fun&Pavilion www.biquge.info[Burn^Text^Library][]. [774] [buy]. [ ] [Book House (7764)]

"You see, I'm working it, but it's other places that are really struggling, if we can't do this when we build bricks, then our buildings will be vulnerable, this time you come here mainly to learn this, in the future you will often come and go to various important places, check whether the watchtowers, bunkers and other buildings around the country are qualified, if these buildings are slightly damaged, you also need to repair them, if you can't learn it, you can't do it. You can see that I just used the circle to transfer the force to other places, and the watchtower that we are going to learn today is also a circle, but it has brought down the arch that I just erected, do you understand? ”

Speaking, Zhang Qili quickly stacked a layer of bricks on the foundation, this time everyone understood, he built this layer of bricks on this circular foundation is a circle composed of two enlarged round arches, but Zhang Qili is not only a layer of bricks, the thickness of this watchtower is three layers inside and outside, when the outermost layer of bricks is stressed, the force will be transmitted to the left, right and back bricks, and the middle layer of bricks will be transmitted to the left, right and back bricks, so that the force will be broken down into countless parts, Finally let all the bricks bear together.

"Master Zhang, in Xia Xu Aiyun, do I have a question I can ask?" At this time, a young man with thick eyebrows and big eyes said.

"You're welcome, if there's anything you don't understand, just ask."

"You said that putting about half of the gravel in the foundation can make it stronger, I wonder if you can put more more?"

"No, it's like taking medicine, not the more you use, the better the effect, after our countless experiments, put in five layers is the most, generally speaking, put in three layers to five layers of gravel effect is not very different, so in order not to make mistakes, you can put a little less when you use it in the future.

"Thank you, Master Zhang, for your advice."

"You're welcome, who has a problem?"

"Master Zhang, in Xia Zhang Wei, may I ask why the city wall should be built straight since the circle has such great benefits? Why don't the walls be round? ”

"That's because it's useless to make the walls in a circle, but please see, if I take out a section of a one-zhang long wall from this round watchtower, how big is it? Isn't it much smaller than the arched door I just showed you around? What is the difference between a circle with a radius of ten zhang and a circle with a circle of one hundred zhang in the same way? Is it true that the larger the circle, the smaller the angle of this section? How long is the city wall, how big is a city, if the city wall of a city is round, you can basically not see any angle even if you take out a section ten zhang long, which is basically similar to a square, so as long as the city wall is added to a certain thickness so that people can not break it, understand? ”

"Please ask Master Zhang for advice, I understand."

It's a very simple truth, but no one can figure it out before this Master Zhang didn't say it, Yin Lei also understood it, but what he understood was not only these, everything Zhang Qili did was the use of 'force', Yin Lei's 'dragon and tiger technique' was also the use of force, and today I saw here Yin Lei suddenly understood a truth, if he couldn't take his understanding of force to the next level, it was impossible to practice the 'dragon and tiger technique' to perfection, and he only noticed the use of ingenuity before, but he didn't understand it fundamentallyThe principle of 'force', like people only know that they can resist damage when they wear armor, but they don't know why the same blow hit the body, the force is the same, why is it okay after wearing armor? Today, Yin Lei suddenly understood that after wearing the armor, the area of the force was expanded, just like a person using a pound of force on one finger to press another person, it is impossible to crush other people's skin, but if it is with a needle, the same pound of force can pierce the opponent's skin.

At this moment, Yin Lei suddenly figured out a lot, and he also suddenly understood the use of 'force', the original 'dragon and tiger hunting technique' that had been completed was impossible to make progress in a short period of time, but today Yin Lei's understanding of 'force' suddenly increased greatly, and he understood that as long as he gave himself another period of time, his 'dragon and tiger hunting technique' would not be successful and would definitely make great progress.

"My first layer of bricks has been laid, and I want to add a layer of loess when I build the second layer of bricks below, do you know the role of this layer of loess I added?"

"It should be that the size of the bricks and the bricks are not absolutely the same, so you have to use the loess to adjust it this time, right?" Xu Aiyun said.

"Hehe, if it's an ordinary civilian, your statement can be half right, but for us, it can only be said to be three layers right."

"Isn't the purpose of building a house different from that of ordinary people?"

"Yes, we use this layer of soil mainly to glue two layers of bricks together, and the ultimate goal is to glue the bricks used into a large whole, so that it can be more uniform when stressed."

"It seems that the loess can't achieve this purpose, right?"

"Young man, your name is Xu Aiyun, right? You are very smart, yes, with loess is not able to achieve this purpose, we officially built the watchtower with lime and glutinous rice soup, don't look at these two things seem to have no connection, in fact, they can be added together can have a very peculiar effect, it can stick the bricks firmly together, and after drying is not afraid of water, we have done experiments, after the dry this thing soaked in water for 70 days will gradually soft, it will take 100 days to soak, That is to say, as long as the wall built with this kind of thing does not rain for three consecutive months, it will be fine, even if it rains for three months, it will only be soaked in the outermost small layer, and the inside is still fine, but the cost of this thing is very large, so we can only use ordinary loess to let everyone practice today, and at the same time, everyone remember, this kind of thing is afraid of acid, if one day you are locked up by the enemy in a cell made of this kind of thing, you can find a way to use vinegar or something like that to dissolve it. (The ancient city walls of our country were basically built in this way, and you can search for them in Baidu.) ）

Saying that, Zhang Qili put on the second layer of bricks, and then announced that the time was almost up, and the construction would start after a quarter of an hour's rest, Yin Lei knew that a watchtower was completed in eight hours, which meant that the first paragraph was over, so they also returned to their own places and started to work.

Twenty days later, there were dozens of watchtowers about two feet high in this courtyard, and even if the masters of the engineer battalion tried their best, there were still more than a dozen people who did not complete the task, and even the watchtowers that had been built were nearly half unqualified, and several of them could not hold out for a few days if no one moved them.

Yin Lei looked at his watchtower and was also very dissatisfied, although the tower he built was already one of the best among these towers, but it was compared to the one built by those engineer battalion masters...... No, that can't be compared at all, standing in front of a watchtower that has been built by the master of an engineer battalion, Yin Lei can only smile bitterly when he looks back at his watchtower, the watchtower built by others is like a work of art, and he can't find a prominent brick corner around the tower a few times, the whole watchtower shape is very beautiful and round, and even if he has worked hard, there is no prominent brick corner, but the whole tower body is not a circle but an ellipse, and with the different heights of the tower, the whole tower is still a little twisted, and shook his head impatiently, Yin Lei knew that there was no way to do this, if he could build a few more, there should be a lot of progress, but if he wanted to reach the level of others, it would not be possible to do it in a few months.

With the sound of a drum, everyone gathered in the open space on the other side of the courtyard, there were more than a dozen people standing there, and the leading one was Wu Youchun, seeing that the people had almost come, Wu Youchun cleared his throat and said: "Twenty days have passed, and I have seen the tower that everyone has built, in general, this is already very good, especially Xu Aiyun, Zhang Baoju, Wang Chengren, Li Qingsheng, Niu Caijin, Xuanyuan Zongheng and other people built the tower is very good, and it is not easy to build the tower in twenty days. You don't have to compare it with the tower we have built, if the tower you have built in twenty days can be similar to ours, then what do you want us to do? Now twenty days have passed, there are still ten days left for you to study this time, and in the remaining ten days we will explain to you some simple traps and traps in the building and how to crack them, now you can build the tower yourself, and you have some understanding of ordinary building techniques, and it is not difficult to learn these again, but those who have not yet built the tower have to work hard, you must build the tower in these ten days, otherwise you will be punished when you return to the camp. ”

In the next ten days, the master of the engineer battalion explained some simple mechanism ambushes and other things to Yin Lei, he is no stranger to these Yin Lei, he was born as a hunter, and he was already very proficient in these, and later exchanged some experience with the hunters there in Xing'antai, and the level was improved again, but Yin Lei usually set traps in the wilderness, but this time he learned how to use the ground type to increase the power of these mechanisms, which is not difficult for Yin Lei at all.

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