In the evening, in the small hall of the technical college, more than 30 people had already occupied their seats, waiting for Yan Jiecheng to speak.

When Yan Jiecheng came, he was taken aback, the small hall was not only full of instructors from their department.

Dean Yan, Luo Gong, and several experts from Jiaotong University are also there.

If Yan Jiecheng hadn't seen Dean Yan talk to those experts, he would have run away a long time ago.

After all, there are some things he does that are not authentic.

This Dean Yan is too, just a small lecture, and he also promotes it everywhere.

It's okay for him, the dean, to sit there, and the key is the member of the department, Professor Jin of Jiaotong University, these people are here, and it is his turn to give a lecture by Yan Jiecheng.

Just like Professor Jin of Jiaotong University, he is the initiator and founder of our national railway transportation discipline.

He has built a complete system of transportation management disciplines in China.

Whether it is in terms of academic status or debt relationship, this kind of character naturally brings Yan Jiecheng a sense of oppression.

"Dean, Luo Lao, Professor Jin, experts, why are you here? Isn't this a scare boy! Yan Xie ran forward and said hello to a few people.

Professor Jin and Luo Gong both smiled, saying that they were here to listen to the ideas of young people and touch on the bypass.

A thin middle-aged man wearing glasses next to Professor Jin said with a dark face: "Professor Jin, they are here to listen to the lecture, but I am not, I am here to collect debts." ”

"Haha, Teacher Jiang laughed, laughed, everyone knows that Teacher Jiang is generous, for a few books, not to, not to.

Besides, Jiaotong University has a lot of money, and it supports us poor relatives with a few books, how can there be any reason to go back, which is purely a joke. ”

Seeing this, Teacher Jiang of Jiaotong University said to the surroundings: "This kid really plans to treat me as Captain Jiang." ”

The crowd laughed.

Professor Jin smiled and said, "Director Yan, let's start talking, I'm in charge of what I have said, and I'll send you the books." ”

Seeing the smile on Yan Jiecheng's face, he continued: "If you don't speak well, I will ask Teacher Jiang to come to collect debts every day." ”

"Hey, don't worry, Mr. Jiang is destined not to enter our academy."

Yan Jiecheng listened to Professor Jin's words and hurriedly said.

This Professor Jin is in charge, and he can really be the master.

After all, after the founding of the People's Republic of China, he and President Mao were responsible for re-establishing Jiaotong University, and they were still very authoritative in Jiaotong University.

In case the speech is really bad, it is good to notify the doorman not to let him go to Mr. Jiang, anyway, he is a braggadocio, and it must be realized.

Seeing that everyone had arrived, Yan Jiecheng confessed, walked up to the podium, and began today's lecture.

"Ahem, experts, teachers, you have limited time, so I won't talk nonsense.

Let me talk about it, seamless lines.

As we all know, the rail joints of our railway lines are the weak link.

The load here is aggravated, and the rail is easy to fall off the block, which aggravates the vibration of the vehicle.

So how do you eliminate this weak link?

That's what we're talking about today – seamless lines. ”

Yan Jiecheng talked about the concept of seamless lines, which were mainly taught to the teachers in his school.

Most of them are engineers, and they don't know much about cutting-edge technology.

Unlike the professors of Jiaotong University, they all specialize in this and always pay attention to the latest developments in the industry.

Yan Jiecheng took a sip of water and continued:

"Seamless lines have been around for more than 20 years. In small days, this kind of line has been laid in Germany.

As we all know, the advantage of a seamless line is that the joints are greatly reduced compared to ordinary lines.

It not only saves a lot of joint parts and line maintenance workload, but also reduces the joint vibration of the train, runs smoothly and reduces noise.

On the other hand, by reducing vibrations at the joints, the service life of line equipment and rolling stock can be extended.

Therefore, it should be the direction of the development of railways in our country.

There is a core problem in this, that is, how to control the phenomenon of thermal expansion and contraction caused by temperature changes.

The force of the rail to expand and contract freely due to the change of air temperature is tentatively referred to as the temperature force ......"

Yan Jiecheng spoke freely for two hours, saying that his mouth was dry, and he drank a few sips of water fiercely.

Rested for a few minutes.

Only then did he say: "A little personal opinion. Then he looked at Luo Gong and Professor Jin's direction, and said with a smile: "I saw the smile in the generous house." ”

"Director Xiao Yan, you spoke very well, very insightful, it really embarrassed me, I didn't find you earlier." Professor Jin said and glanced at Luo Gong with resentment.

Luo Gong ignored him at all, and asked Yan Jiecheng, "Director Xiao Yan continues to talk about the problem of welding. ”

Yan Jiecheng thought for a while and said: "Rail welding, there are currently three mainstream methods in the world.

Thermite welding, pressure welding, contact welding.

It is a technology that reflects the country's industrial strength.

At present, the industrial strength of our country is still somewhat weak, so this problem..."

Luo Gong was also bitter when he heard Yan Jiecheng's words.

Seeing this, Professor Jin said: "Last year, some units began to study the cathodic protection thermite welding technology, and I heard that the progress is quite fast. ”

Everyone asked some questions one after another, and Yan Jiecheng also explained.

It was almost 10 o'clock when the lecture ended.

"Professor Jin, are you satisfied?" Yan Jiecheng found Professor Jin and asked with a smile.

Professor Jin smiled, looked at him and shook his head, and then said, "The boy is good, knowledgeable and insightful, and he speaks well, but it's a pity that it's not from our school." ”

Yan Jiecheng smiled and said, "Professor Jin, I am also a graduate of our school. Then you look at the book donation. ”

Professor Kim: "Okay, that's what I promised to speak naturally." ”

Yan Jiecheng said to Dean Yan: "Dean, hurry up, Professor Jin said that he would donate books to us." ”

Teacher Jiang saw it and said, "You Yan Laoxi, don't go too far." ”

If you can't prostitute it, Yan Jiecheng doesn't care. Just send it haha and it's over.

Everyone greeted each other and went home.

Yan Jiecheng also rode his bicycle to his home.

Today's lecture has touched him a lot, but he is also quite frustrated.

In later generations, he was accustomed to things, and seemingly simple construction was supported by the industrial system of a large country.

I really understand the sentence: behind the infrastructure madness is the contest of the national industrial system.

A simple rail welding, there are not too many such manufacturers in later generations.

He was a little depressed, and a person's strength was like a drop of water, unable to turn up a single wave in the sea of the times.

He Yan Xie Cheng even if it was a bowl of water, it would make no difference if he poured it all in.

Seeing the brightly lit railway station from afar, Yan Jiecheng remembered that they had built this majestic building under such difficult conditions.

I can't help but feel proud that nothing can stop the country from moving forward.

Yan Jiecheng's frustration in his heart was swept away, and he was agitated, no matter what difficulties he had, he first led people to solve the theoretical basis of the seamless line.

After the idea was reached, the feet climbed even faster, like a streamer through the ancient city.