Siheyuan Great Craftsmen

Under the domestic industrial conditions at that time, there was a type of rocket launcher that was extremely suitable for mass production. That was the Type 69 recoilless artillery rocket launcher, which was later successfully copied and improved.

At this moment, Zhou Tian was drawing this individual rocket launcher. As for the RPG-7 portable rocket launcher, he would not give it up, after all, this rocket launcher is a classic anti-tank weapon.

He believes that once these two anti-tank rocket launchers come out, the war situation on the peninsula battlefield will inevitably usher in a new turning point.

The Type 69 recoilless artillery rocket launcher is mainly composed of four key parts: the launch tube, rocket, piezoelectric signal and sight. It has a simple structure, relatively simple operation and is easy to use. Not only is it cheap and suitable for a large number of equipment, but it is also powerful and can effectively attack targets such as tanks, bunkers, and shelters. Like the RPG-7, it has certain multi-purpose capabilities and can fire a variety of ammunition. It can be said that it is basically a replica of the RPG-7 portable rocket launcher.

Of course, the difference from the RPG-7 portable rocket launcher lies in the three aspects of propellant, rocket diameter and range. Among them, the propellant of the Type 69 40mm rocket launcher is Shuangshi-2, while the RPG-7 uses diethylene glycol.

在火箭弹弹径方面，69 式使用的火箭弹有着多种弹径，比如 57 毫米、60 毫米、95 毫米等；其首先研制的火箭弹是弹径 85 毫米的破甲弹。至于 RPG-7 ，则通常为 85 毫米。

在射程上，69 式火箭筒首先研制的 85 毫米破甲弹初速为 300 米/秒，射程 300 米，静破甲深度 300 毫米，后来改进型破甲深度达到 600 毫米，65 度着角时破甲深度 120 毫米。而 RPG-7 的有效射程大幅增加到了 350 米。

Although the Type 69 is slightly inferior to the RPG-7 in terms of effective range, it is still considered one of the more advanced rocket launchers in the world at the time.

Countless parameters flashed through Zhou Tian’s mind rapidly. The pen in his hand never stopped, and drawings were drawn one after another.

Even at lunch time, he asked Dong Tianbao to bring him lunch. It can be said that he was fully immersed in the drawing of the Type 69 recoilless artillery rocket launcher for the entire day.

It was not until the end of the get off work day that Zhou Tiancai came back to his senses from drawing. He hastily put the drawings into the space, then hurriedly left the office, pushed the cart out of the steel mill, and rushed towards Union Hospital.

After all, he and Shen Yulin had just confirmed their relationship yesterday, so it would take time to develop feelings. Although the distance between the steel mill and Union Hospital was not close, it did not stop Zhou Tian from missing Shen Yulin.

Along the way, Zhou Tian rode his bicycle very fast, and it took him only about half an hour to reach Union Hospital. He parked his bicycle outside, asked the guard about Shen Yulin's situation, and then trotted into the building of Union Hospital.

As soon as he ran into the building, he saw Shen Yulin, who was just getting off work at the hospital, walking down the stairs with two beautiful girls, talking and laughing.

"Yulin!"

Zhou Tian looked at Shen Yulin, whose every move exuded charming charm, and there was no one else in his eyes, so he shouted loudly.

"Brother Zhou, why are you here?"

When she saw Zhou Tian, ​​Shen Yulin's beautiful eyes lit up instantly, with a hint of shyness flashing across her face. Ignoring the teasing in the eyes of the two girls beside her, she walked towards Zhou Tian and asked happily.

"I'm off work, so I came to see you!"

Zhou Tian smiled innocently, scratched his head and said.

For some reason, looking at the beauty in front of him, he always felt that his brain was not very clear. Even though he had a lot of things to say in his heart, he couldn't say them.

Looking at Zhou Tian's silly smile, Shen Yulin couldn't help but scold:

"Brother Zhou, I remember that your rolling mill ends get off work at 5 o'clock, and ours ends at 5:30. You rushed from the rolling mill to Dongdan in half an hour. You rode so fast, aren't you afraid of getting into trouble?"

However, despite saying so, Shen Yulin felt sweet in her heart when she heard Zhou Tian's words.

"Yulin, who is this? Why don't you introduce her to us?"

Just as Shen Yulin finished speaking, the two girls came over, their beautiful eyes instantly fixed on Zhou Tian, ​​and asked teasingly.

"Yes, Yulin, we are your good friends, you can't hide anything from us!"

As the two girls spoke, they looked at Shen Yulin again, with a different meaning in their beautiful eyes.

"Hey, Sister Zhang, Sister Liu, what are you talking about?"

Shen Yulin was about to introduce Zhou Tian, ​​but when the words came to her lips, she felt shy and hesitated for a moment.

On the contrary, Zhou Tian looked at the two girls and said generously: "Hello, I am Yulin's boyfriend, my name is Zhou Tian!"

"Zhou Tian, ​​so you are Yulin's boyfriend. I was wondering why. Yulin was absent-minded after work today. We thought something happened to her. It turns out she is in love now."

As they spoke, the two girls couldn't help but giggle.

"Hey, Sister Zhang, Sister Liu, what are you talking about?"

When Shen Yulin heard her two friends say this, her pretty face immediately turned red with shame. She lowered her head and did not dare to look at Zhou Tian.

"Look, look, Yulin is still shy. Forget it, Xiao Liu, let's go and not disturb them from dating!" As she said that, one of the girls pulled the other girl and ran out with a smile.

Only Shen Yulin was left stamping her feet on the spot and giving Zhou Tian a shy look.

"Look, it's all you!"

"Okay, it's all my fault, Yulin, let's go, I'll take you home!"

Zhou Tian looked at the shy Shen Yulin, who had an intoxicating charm of her own, with a hint of surprise in his eyes, and said softly.

"Ok!"

Shen Yulin felt even more uncomfortable under Zhou Tian's gaze. She lowered her head, responded softly, and walked out of Union Hospital one after another with Zhou Tian.

When they arrived outside the Union Hospital, Zhou Tian got on the bike, motioned for Shen Yulin to sit on first, and with a hard push, he rushed out in an instant.

"Let's go!"

With Zhou Tian's shout, the car drove steadily towards Shen Yulin's home.

Along the way, humming the classic song of the era, "The Sea Voyage Depends on the Helmsman", carrying the goddess of his heart, Zhou Tian was so happy that he seemed to be bubbling.

Shen Yulin behind him felt particularly sweet in her heart when she heard Zhou Tian's happy voice, and she also sang along with Zhou Tian.

The pleasant singing was like the song of an oriole. To Zhou Tian, ​​he felt that even the sound of nature was no better than this.

Time flies, but the journey seems short.

In less than twenty minutes, they arrived at the courtyard house where the Shen family lived, No. 31 Mianhua Hutong.

The car stopped, and Zhou Tian felt that the twenty minutes seemed as short as one minute.