"What?" Zhao Guodong asked Wang Erzhu.

"Director Zhao, didn't the troops ask? Hurry up and call back to the troops, so that they can come tomorrow to pick up the tanks. Liu Jianzhi said to Zhao Guodong.

"Yes, hurry up and reply to the troops, if it can't be repaired again, the commander of the tank division will come and kick the door of my old Zhao's office." Director Zhao had a helpless smile on his face: "Okay, let's get off work, it's not easy after a tiring day." ”

"Yes, Director Zhao, you go slowly." Liu Jianzhi said, turning his head to look around: "Well, everyone did a good job today, they are all tired, so let's get here today and get off work." ”

In the factory, the master is the authority, and the apprentices under him are relieved to hear the master say this, and the day has passed again!

The crowd dispersed, leaving only one tank after another, and the barrel of one of the tanks was still dirty, and the dust of gunpowder and yellow copper stained there.

Everyone forgot about it, of course, some people forgot it on purpose, such as Liu Dajun, Huang Chuanchuan and them, who will wipe this cannon breech? If you can escape for a day, it's a day, whatever.

The canteen is far away from the repair workshop, and when Wang Erzhu was panting and riding his bicycle over, he just threw down the car and saw Qin Zhenhua coming over on a bicycle.

"Brother Zhenhua, it's really dangerous today, you don't know, as soon as you left, Director Zhao came, and Master Liu took all the credit for repairing the tank on him." Wang Erzhu greeted Qin Zhenhua and said loudly to him.

"Got it, don't shout, it's not good for people to hear." Qin Zhenhua said to Wang Erzhu, it seemed that his mind was not on this matter.

"I thought you came directly to the cafeteria, let's go, let's go in, you sit, I'll fetch you food." Wang Erzhu said.

Although the two have only been in contact for a few days, after these things, Wang Erzhu has already recognized Qin Zhenhua as a good friend.

The meals in the canteen are very simple, they are all exactly the same, pork stewed vermicelli, the fat pork belly, real, there can be more than a dozen pieces in a bowl, outside, it can only be eaten during the New Year, and the food in the factory is still good.

Holding steamed buns in one hand and chopsticks in the other, Qin Zhenhua ate it in a big gulp.

"Brother Zhenhua, you are really god today, and you will eliminate the fault in a few clicks, what is going on?" Wang Erzhu asked Qin Zhenhua while eating, for him, today is also extremely surprised, he has been here for three days, just wiping the cannon chamber and hanging the tracks, he didn't know at all, Qin Zhenhua would actually do this.

"Well, you have to grasp the principle of the tank." Qin Zhenhua had nothing to hide from his brother, and with the steamed buns, he began to compare.

"The power system of the 69 tank, most of which is the same as the 59 tank, but there are also innovations, for example, its power is enhanced, the torque is increased, and if it is still matched with the original transmission system, there will be an overload phenomenon, and the life cannot be guaranteed, so the strength must be increased."

"However, the space is limited, and increasing the strength will face the problem of insufficient space, take the side reducer of the 69 tank as an example, the shell is as large as the 59 tank, so that when designing, its straight teeth are made into helical teeth." Qin Zhenhua said, put the two steamed buns together, and turned them into the shape of two gears, straight teeth and oblique teeth, and came out with two pinching.

"This increases the contact area of the gear and increases the strength, but it puts forward higher requirements for processing, and the accuracy of the assembly is also high, and the gear is marked with a tooth."

Ordinary gears, just plug them in, but the gears of this helical tooth are not good, you need to align the teeth, make sure that the gears on both sides are marked in alignment, otherwise, the gears will make that sound because they are not accurately occluded.

But this fault is very hidden, when the car is cold, it does not sound, because the gear oil inside is still viscous, the gap in contact, and after the hot car, the gear oil becomes thin, and the gap is loose, and it makes that kind of rattling sound.

Every time they make repairs, the car gets cold, so it's fine when it just goes out, but when it's hot, the fault returns.

"I see." Wang Erzhu suddenly realized: "Brother Zhenhua, how do you know?" I don't think Master Liu understands. ”

How do you know? Qin Zhenhua had already put down the steamed buns, his hand unconsciously touched his clothes, and in his inner pocket, there was a red-skinned diary,

That's my father's relic. And the fault that can be easily solved today is recorded in this diary.

When the tank factory was just built, it was completely a copy of the Soviet model, and the production was only in charge of production, and the design department was only in charge of design, but as time went by, domestic factories were also developing, and factories had set up their own research and development institutions, at least to be able to improve on a small scale.

The technical department responsible for R&D in a machine factory is full of well-known talents, such as Qin Zhenhua's father, who is a tank design institute and an armored force academy who want to poach talents, but Qin Zhenhua's father doesn't go anywhere, so he is willing to stay in the factory and listen to the roar of the machine all day long, but...

"Ouch, I forgot, the barrel of the 59 tank hasn't been wiped yet." At this moment, Wang Erzhu suddenly patted his head.

"That tank, don't worry about it, anyway, Master Liu has promised to come down and let others wipe it." Qin Zhenhua said.

Others? How is that possible, the two of us, that has always been taken care of by Master Liu! Anyway, the tanks have been repaired, and tomorrow, maybe he will turn his face?

"Don't worry, we'll see tomorrow." Qin Zhenhua said that he had just ridden a bicycle and walked around the factory, although he did not find what he was looking for, but he saw that another 69 tank from the army had returned to the factory, and the problem was exactly the same as today.

This kind of large-scale military factory, directly from the railway, the tanks made, that is also directly loaded on the train for delivery, when Qin Zhenhua saw it, he had just gotten off the platform, so Master Liu definitely didn't know that there were still 69 tanks waiting for him!

The last mouthful of vegetable soup poured into his mouth, he was so full, Qin Zhenhua wiped his mouth, and was about to leave, when he saw a person holding an aluminum lunch box, walked to their table, sat down, and looked up, the other party's kind eyes were looking at him, his eyes were full of the care of the elders, Qin Zhenhua's heart felt a burst of warmth.