Zhang Tan stepped forward to greet him, and Renault asked, "I heard that you know carpenters? Do you know how to hang barrels?"

"I know how to do it." When talking about craftsmanship, Zhang Tan's momentum became much stronger.

"It's not an ordinary barrel. The worst one I want must be without leaking water. It's best to be completely sealed and even the air must be isolated." Renault said. It is said that the French barrel hoop master has a very high status. After thousands of years, some people still believe that the oak barrels hand-held are the best, and the barrels made by machinery are soulless.

Well, Renault doesn't understand these things. Not to mention whether the barrel has a soul or not, he can't even taste the quality of the wine.

When making wine, he really doesn't like Dachu rice wine. It's a kind of semi-sweet but not sweet, and it has no degree, and there are many impurities in it. Is it really wine?

The most excessive thing is that you have to sieve when drinking, each person has to sieve as much as you drink. Oh, hey, that's also called drinking?

Zhang Tan pondered for a moment, looked up and asked, "Sir, what is air?"

Renault patted his forehead lightly. How do you explain this? You should first give Zhangtan a simple chemistry? The problem is that the air is not easy to prove. It would be easy to handle if it is placed in the school. Any junior high school has an experimental building, but he has nothing at hand. It is very difficult to let Zhangtan feel the air intuitively.

"Breathe, you know, we are breathing, and what we breathe is air." Renault was not ready to teach the old man, so he explained a few casual words. It would be best if he could understand it. If he couldn't understand it, he would pass the test as long as he could do it without leaking water.

Sure enough, Zhang Tan seemed to understand it, and after a while, he nodded and said, "Sir, I can try it, but ordinary wood is probably not good. There is a kind of white-toothed tree, made of soft and tough, and it is just right to use it to hold a barrel."

"No problem, I'll just ask someone to buy it." Renault nodded, and Li Si went out to ask someone to buy it.

There were in Dingjun City, and a few trucks were quickly brought in, and grapes were also sent there. The trucks were connected into a convoy. The place Renault chose before was relatively empty and was just for the materials.

Zhang Tan broke the wooden board and used a mortise and tenon structure to swing the barrel. Renault nodded secretly. This technique was beyond his imagination. But is the barrel made of mortise and tenon?

The name of the craftsman is quite interesting. As for whether it is good or not, I will talk about it when the bucket is out, and Renault can't understand it anyway.

There was no idle here. The group of tiger girls' subordinates were pulled over. They first washed the wooden basin, cleaned the grapes, soaked in the wooden basin for half a quarter of an hour, then mashed and added sugar...

You read that right, Renault makes wine this way, he wouldn't have been able to do it. This is the way to make wine at home. As for how the French make wine, who cares?

Renault guided the wine making for a while, and followed Cui Qing to guide the smelting. A furnace of fine iron was cast into pieces, and a pot of grape juice was also prepared.

Zhangtan's craftsmanship is really unstoppable. After making the first white-tooth barrel, try it with water. It's really good. The technology is just too effective. More than ten furnaces have been smelted over there. After hundreds of pots of grape juice are mixed, you can just hoop out a wine barrel for me?

How come this is done? Zhang Tan should not do it first. Huya then transfer some carpenters to come over and let Zhang Tan be a teacher and guide the carpenter to hoop.

Although the hoop barrel is a technical job, the difficulty is not very high. With Zhang Tan's guidance, the speed of the carpenter's hoop barrel has already caught up in a few days, and it is the same as the speed of the Hu Meier's subordinates processing grape juice.

Most of the Feiniu Duanliu iron has been extracted. The one piled in front of Renault was a metal ingot worth ten kilograms per piece, and it had already exceeded three hundred kilograms. After three or four days of refining, it would be almost done.

Zhang Tan was also idle, stood beside Renault, prepared a small furnace, and transformed from a carpenter to a blacksmith. He found that the new master was very magical. After secretly inquiring, he was surprised to find that Renault was actually the legendary secret master.

A few days ago, he found something wrong. The gentleman seemed to be invited to the furnace when it was almost completed. He gave a few casual tips and it was released soon. The one that came out was actually a piece of fine iron, and it felt a little different from ordinary fine iron.

He had been enduring for several days, and because of his different identities, he didn't dare to ask. But this guy liked these things since he was a child, and he was really sad.

"Come on, build an iron ruler first, with marks on it. The marks must be accurate. Can it be done?" Renault put a wooden ruler in front of Zhangtan, without even a serious ruler. You said how to let the workers work, so the first thing Renault wants to build is the iron ruler.

After hearing Renault's request, Zhang Tan nodded. It was not difficult. The iron ruler was actually a long metal piece, which was completely undifficult. It was difficult for others to carve the marks on it. Zhang Tan thought there was no problem, so he just carved the marks by hand.

Renault gives a piece of chrome steel, and the ruler is a commonly used tool and does not require too much strength. Stainless steel is the best.

Zhang Tan put the metal blocks into melting and heated them. As soon as the metal blocks were burning red, he realized that this was different from any kind of fine iron he had played with before.

"What do you want to ask?" Looking at the old man's desire to speak but stop, Renault asked on his own initiative, don't let this old man get into trouble.

"Sir, this iron...is not very different."

"Well, this is a fine iron with chrome, which is naturally different. Its biggest advantage is that it won't rust, and it won't rust even if it is thrown into the water." Renault nodded and said. Cui Qing's people have tried it. Renault's metal formula may not be very reliable, at least it is really stainless steel.

"Sir, what is chromium?" Zhang Tan's heart was trembling. He was sure that the rumors outside were true, and the master was really a secret master.

"Chromel is a type of metal. If the fine iron of chromium is added, it will not rust." Renault began to think about it. He wanted to open a school before, but now he felt that he was afraid that he would think too easily. He didn't know how to explain a simple metal element chromium. He asked deeply, Renault wouldn't even know.

The most obsessed with this chapter is the one who has a strong desire to learn: "Sir, why can't rust after adding chromium?"

Damn, how do I know?

Renault can keep his face calm when he is afraid of anything.

"Zhangtan, it is impossible to build a pavilion in the air. Only by laying a solid foundation can you build a house. You know too little. Even if I explain it to you, I will only become more and more confused as I ask." Fortunately, I have already thought of the excuse before. I am afraid that the matter of opening a school must be released first. Renault must sort it out. Is he really suitable to be a teacher?

On earth, teachers are a very ordinary profession. Many college students think that they can do it themselves. If you don’t believe it, you can see that many students can be tutors.

In fact, this is completely different. Why do formal teachers need to obtain many certificates before they can take up their posts? Why do teachings get along with each other?

If a teacher is stumped by the students, it is very shameless. So the teacher needs to understand the knowledge he teaches thoroughly.

Renault has a lot more knowledge than Zhangtan, but he really has to be serious. Renault doesn't understand many problems.

There are many people who know how to use office software, but how many people can fully play all the functions in the office software? None of a thousand people is good, it doesn’t mean you use it every day, so it doesn’t mean you use it well.

Most people only know what they often use. Only the teachers who teach software will study every sub-function in the software thoroughly.

The more he thought about it, the more depressed Renault became. He found that no matter which subject he taught, he was not sure. Logically speaking, teaching mathematics is the easiest, but when he thought about it carefully, he found that he could not memorize the mathematics textbooks in elementary, junior high school, and high school at all, and could not teach others systematically.

What you can really teach is the four-character operation, plus equations, and the most familiar one is the high-number. There must be a lot of knowledge points missing in the middle.

Logarithms, prime numbers, odd and even numbers, arrangement combinations...

Renault found that he could count a lot of knowledge points, but how can he teach in order? I can't figure it out clearly.

Many time travelers can compile study materials for their sons to go to high school or even college? How do they have brains?

After all, my grades are not bad. Not to mention high school, he can’t even memorize it in elementary school. If you want to write similar materials, you have to recall a little bit. Without ten or eight years, you will definitely not be able to compile a relatively complete mathematics textbook.

All are lying, Renault looked sad and angry!

Not convinced? Come on, everyone has memorized Tang poetry and Song lyrics. How many of them can recite 300 poems in a word? Let's try it?

Renault has also memorized it, but Tang poetry and Song lyrics are not a must-read in life. It’s okay. I remember it when I memorize it. After a long time, I don’t need it. I just forget it all.

Not to mention three hundred poems, it is a bit difficult to remember one hundred poems in full.

I won’t teach anymore, the school will stop running, and I will be able to think of wherever I think of...

"Yes, what sir has taught me." Zhang Tan clamped out a red iron piece and started to wrought iron. As soon as the hammer was on, he knew that this piece of chrome fine iron could be used directly without him forging it.

When Renault ended his career as a teacher with a sad and angry look on his face, the iron block in Zhang Tan's hand also turned into a ruler.

Without waiting for the ruler to completely cool down, hold a chisel in one hand and a hammer in the other hand, look at the wooden ruler, and hammer in one hammer, and the scales of uniform and equal length appear on the ruler.

Renault was no longer sad and angry. He looked at Zhang Tan's work and secretly glanced at him. Is this old man's eyes equipped with laser ranging? Anyway, Renault could not tell what the scale was wrong with his naked eyes.

It is said that the eighth-level worker can see an error of one tenth of a millimeter at a glance, but Renault is not good at it. Those who learn electronics have no advantages in this regard, and there is still some confidence in the error within one centimeter. Obviously, the error of the scale chiseled out of Zhangtan is definitely in the millimeter level.

Millimeter-level errors are in the ranks of waste products in any factory on earth. In Dachu, it is definitely the highest accuracy.

The scale was completed and the ruler was cooled down. Zhang Tan presented it with both hands: "Sir, please give me advice, can I use it?"
Chapter completed!