my scientific age

Chapter 63 Hello Sir!
In an empty classroom.

Fang Yu was sitting upright, but her eyes turned to the corridor outside from time to time, and she was looking forward to it. To be honest, she now expects Yu Hua more than any man in her life, including her own father.

At this moment, a figure appeared, Fang Yu immediately looked over, and when he saw the person coming, there was a hint of disappointment in his eyes. It was not Yu Hua, but Zhou Yuan.

"You came so early and didn't eat?" Zhou Yuan stepped into the classroom and saw Fang Yu sitting in the first row, stunned for a moment, with a look of astonishment on his face.

Fang Yu shook his head: "I didn't eat, I'm not hungry."

What is a meal, she is more concerned about the food of knowledge.

The body is just hungry, is this hungry?

It's not hungry.

Intellectually, she had been hungry for years, and it was real hunger.

"Fang Yu, after learning this knowledge, as I said yesterday, it is not allowed by Yu Hua, and it is not allowed to teach it to the outside world. We must keep it a secret for Brother Yu, understand?" Zhou Yuan understood what Fang Yu meant and came to In the first row, Tong Fangyu was separated by an empty seat, put down the book, and said seriously.

Fang Yu had a serious face and nodded earnestly, "Understood." After Yu Hua left at noon yesterday, the two had a chat and settled on three principles.

First, it is forbidden to teach cartography knowledge without Yu Hua's permission.

Second, strictly keep information about cartography and Yu Hua strictly confidential.

Third, it is forbidden to inquire about the origin of Yu Hua's drawing ability.

Zhou Yuan nodded, not talking much, he didn't need a heavy hammer to play the drum, just remind him once.

The whole person sat upright and waited quietly.

For Zhou Yuan, who wants to become an artillery scientist, the importance of this class is also self-evident. A few years ago, Zhou Yuan has been looking for relevant knowledge about mechanical drawing, but until now, he has not been able to get started. .

The reason remains the same, lack of basic knowledge.

If you want to engage in artillery, you must learn how to draw and read maps, not to mention when you look at maps, drawing is the most important thing.

The two sat quietly and waited without any impatience. The time passed, and soon it was 12:30.

Finally, with the sound of footsteps, under the gaze of the two, a familiar figure who was eagerly awaited finally appeared.

"I'm sorry, I'm late, I just chatted with classmate Tan Qing, and I wasted time." Yu Hua hurried into the classroom, saw that the two had been sitting quietly for a long time, and quickly apologized.

There is a conflict between the drawing class and Tan Qing's after-school tutoring time. Considering that Zhou Yuan and Fang Yu are major customers, Yu Hua can only reluctantly adjust Tan Qing's tutoring class to the afternoon break.

A tutoring class costs 30 yuan, and a drawing class costs [-] yuan. The ten-fold difference cannot be ignored.

"Master arrives, stand up!" Fang Yu's voice was clear and high, like an oriole, revealing a hint of spiritual energy.

The next moment, Fang Yu and Zhou Yuan stood up directly and faced Yu Hua.

"Respect teacher."

The two of them bent down together, as if respecting every gentleman, and greeted Yu Hua with a gentleman's salute.

"Hello sir."

Seeing this scene, Yu Hua froze in place. After two seconds, an imperceptible smile appeared on his face, and he shook his head gently: "Hello, two classmates, sit down."

I have to say, getting along with this group of immortal classmates is really interesting.

Follow the rules, pay attention to etiquette, and control the identity distance just right, so that people will not be disgusted at all.

As expected of a child of the elite.

Hearing Yu Hua's voice, Fang Yu and Zhou Yuan took their seats, with their backs straight, looking up at Yu Hua, the notes on the desktop were opened, and the pencils for sketching were ready.

"Drawing, the common language of technology in the field of engineering, is divided into three categories: mechanical drawing, engineering drawing, and chemical drawing. If you want to engage in any type of engineering research and manufacturing, you can't do without drawing. Today's drawing class is mainly about mechanical drawing."

After Yu Hua spoke at the beginning, he picked up the chalk and wrote four big characters of mechanical drawing on the blackboard, then turned to face the two of them: "If you want to learn mechanical drawing, you cannot do without drawing standards, and every industrial country has its own drawing. Standard, American standard, British standard, French standard, German standard, Japanese standard, my country's industrial development is backward, the level is weak, and there is no unified mechanical drawing standard. I got an American standard by chance, and the book has been lost. Fortunately, I still remember a lot of content, and I will explain it to you one by one.”

I simply made up a history of learning to draw to make up for the lack of content before.

As for whether it is true.

Does it really matter?

Fang Yu and Zhou Yuan kept shorthand with pencils and wrote down the knowledge points explained by Yu Hua. They turned a blind eye to the origin of the drawing standards explained by Yu Hua and did not care.

"The first point of the drafting standard, the size of the drawings, the requirements are rectangular, white, and the size is A0, A1, A2, A3, A4 five basic drawing sizes, which are the basic sizes of the five-size drawings, which are sold outside the school. , The second point, the frame format, the frame must be drawn with a thick solid line on the drawing, and the drawing must be drawn inside the frame. Format..."

Yu Hua narrated in detail, speaking at a slow pace, so that the two of them could understand and write down.

Fang Yu and Zhou Yuan kept taking notes, writing non-stop with their right hand. The two of them were more focused than ever before. From the standard drawing format requirements to the frame format, they all took notes one by one.

After 10 minutes, the drawing format and format were explained.

"Do you understand?" Yu Hua felt his mouth dry, took a sip of water, and turned his eyes to the two.

"Mr. Hui, I have written it down, there is no problem." Fang Yu nodded.

Zhou Yuan responded, "Understood."

"Then let me speak a little faster." Yu Hua sighed seeing the two of them learning without any pressure. If he hadn't gained the trust of 3000 million compatriots and his brain had evolved, he would really be inferior to himself in his previous life. Go up to Fang Yu and Zhou Yuan in front of you.

Not to mention the group of talented and intelligent geniuses in history.

If nothing else, the world-famous Deng Jiaxian is in the Chongde School next door, and he seems to be a freshman in high school this year.

The drafting standard is not difficult in nature, most of the knowledge points are very simple, but the difficult thing is to construct the drafting standard.

After the detailed description of the size and format of the drawings is completed, the next step involves proportions, fonts and diagrams. The proportions remain unchanged. The fonts are selected in simplified Chinese characters.

The proportions and fonts are concise, and the explanation is completed quickly. When it comes to the drawing stage, it is necessary to actually draw the lines. Yu Hua uses chalk to draw each line one by one.

Thick solid line, thin solid line, wavy line, double dashed line, dashed line, thin dashed line, thick dashed line, double dashed line...

Fang Yu and Zhou Yuan became more and more pleasantly surprised, and the more they learned, the more eager they became. They continued to absorb the systematic knowledge described by Yu Hua like a sponge. From the original layman, they quickly mastered the basic skills.

Afterwards, Yu Hua called the two to come up and draw the lines by hand.

Drawing is essentially practice, just reading and memorizing is useless.

The two drew all types of lines by themselves, and remembered the characteristics and standards of each line as quickly as possible. Seeing that the two were really talented in drawing, Yu Hua's teaching speed increased again.

Five ten minutes later.

"Okay, that's it for today. You have already learned how to represent the mechanism. In class tomorrow, you will draw six views of this special-shaped part and one view each. This is homework, be sure to complete it, and remember to buy five Ten sheets of paper of each size, for painting." Seeing that the time was about the same, Yu Hua finished today's drawing class and said to the two of them.

In five to 10 minutes, the progress of the mechanical drawing was pulled to the representation method of the mechanical parts, and the progress was objective.

"Mr. Xie is teaching." Fang Yu and Zhou Yuan nodded, wrote down the homework and requirements informed by Yu Hua, and prepared to buy blueprints and drawings later. it is good.

This notebook full of drafting materials is extremely important to the two of them.

"I'll go first, go back to rest, and you continue to study." Yu Hua smiled slightly at the two of them. This kind of experience of being a student and a husband is very interesting.

Now that the role of Mr. is over, it is time for him to go back to being a student.

Yesterday, Yu Hua had finished reading all the foreign high school mathematics textbooks prepared before, and today Yu Hua is going to look for some more mathematics textbooks.

(End of this chapter)