Qin Zhenhua talked and laughed with these heavyweight leaders, and also won the affirmation and praise of the leaders, on the entire plane, everyone was watching, maybe when they just got on the plane, everyone didn't pay much attention to this young man, they just thought that he was a person who rubbed the quota through special means.

Who would have thought that people have real talents and learning, and they can satisfy both Commander Huang and Minister Zhu, it is not simple, as for what his plan is, there is no need to worry, when he arrives at the destination, he will naturally know.

The first stop of the investigation is naturally the United Kingdom, no matter what differences there are in other imported projects, in terms of tank guns, it is not said, it is the L7 tank gun of the NATO standard standard!

This tank gun was developed by the British. As for its origin, it has also been rumored that there are many versions, one of which is quite interesting.

After World War II, the Soviet Union created the classic T-54 medium tank, and when this tank appeared, at first, Western countries were very unimpressed, believing that it was just an upgraded version of the classic T-34 tank, which was more than enough to deal with existing guns.

As a result, in the Hungarian events of 1956, Britain was given the opportunity to get back a T-54 tank equipped in the Hungarian army.

So, in the face of this tank, they began to measure in detail, and after such a measurement, they changed their faces, the first armor of this tank actually reached 120 mm, plus an inclination angle of 60 degrees, and the vertical equivalent actually reached a thickness of 240 mm!

It is impossible for any tank gun in the West to penetrate this tank, so the T-54 crisis came.

After all, this is the main equipment of the Soviet Union on the other side, they can be pushed over with a torrent of armor at any time, and when the time comes, if there are no tank guns on this side that can penetrate it, what a terrible thing!

In fact, if we talk about the psychological pressure they faced at that time, it is estimated that the T-62 crisis they faced in China after the battle on a certain island in the north was over.

The hands of the Westerners are starting to tremble, and they must have a new tank gun to cope with this crisis!

And such a glorious task was naturally entrusted to the old industrial power, Britain.

Britain has a profound industrial heritage, created a lot of brilliance, far from it, in recent years, Britain has made a considerable contribution to the engine, the aircraft jet engine, which was invented by the British, and now, they have even begun to use this engine on warships, which are far from the forefront of the world.

The British Royal Arsenal accepted this task, and then, they lived up to expectations, and after three years of research, they finally built this gun in 1959, and since then, it has also become a generation of famous guns in Europe, installed on tanks in many countries, and has become a standard tank gun.

In fact, regardless of whether this statement is reliable or not, in short, this creative L7 tank gun finally allowed the West to get rid of the crisis of the T-54, and even, not only the T-54, but now the T-72, this tank gun can be easily penetrated, with the continuous development of new ammunition, in the later period, the use of more advanced armor-piercing shells, and even let the penetration depth of this tank gun exceed 400 mm, and the power of the initial 120 mm smoothbore tank gun is about the same.

Moreover, its benefits are not only powerful, but also the light size and good adaptability brought by the exquisite manufacturing process are deeply loved by tank designers.

If a tank gun wants to have high power, it has to use more charges, and the tank gun has to withstand greater chamber pressure, and the L7 tank gun is such a high-chamber pressure tank gun, as the pressure of the gun chamber increases, then the pressure on its tube wall will also increase.

Therefore, it must not be solved by simply increasing the thickness of the barrel wall, which will not only limit the increase, but also bring additional weight.

The turret is rotating, and if the barrel is too heavy, there will be more resistance to rotating. In this way, new materials and processes have to be applied.

Electroslag remelting steel, body tube self-tightening process, is the key to achieve performance.

If you compare specifically, the main gun of the T-54 series tank is the 100 mm D10T gun, which is a tank gun transplanted from the naval gun, which is not as good as the L7 gun in terms of barrel length, chamber pressure, muzzle velocity and other performance, but in terms of weight, it is 1.95 tons. The barrel of the L7 tank gun is only 1.28 tons, which is 35 percent lighter.

In this way, the adaptability of this tank gun is very good, and countries have adopted this tank gun, which naturally also looks at it because it is easy to install, and the tail is also small, so the space inside the tank turret can be more generous.

Now, this tank gun is still their main force, even if the United States develops a new tank, it is still temporarily installed on it.

It can be said that this tank gun can be called a famous British gun.

This time, we are determined to obtain this tank gun, not only to purchase this tank gun, but also to have the technology to manufacture this tank gun, with these technologies, we can make a larger caliber high-pressure tank gun.

It's just that it's not easy to get such a harvest!

Qin Zhenhua has also put in a lot of efforts for this, and now, he has shown his plan to the two team leaders, and has also won their affirmation, but it is still unclear whether he can succeed in the end.

It's man-made, as long as you find a way, you will definitely be able to achieve your goals!

With such thoughts, Qin Zhenhua returned to his seat, only to find Wang Erzhu on the side, his face pale.

"Erzhuzi, are you airsick?" Qin Zhenhua was stunned for a moment.

Civil airliners do not do any high-maneuver flight maneuvers, and the flight of this kind of trunk airliner is very smooth, there will not be too many bumps, and the boat is not at the same level at all, and Wang Erzhu usually sits on a bumpy tank, and he has never fainted.

Is it because of the air pressure?

The airliner flies at an altitude of 10,000 meters, and the air pressure outside is very low, although the cockpit is pressurized, but the pressure is still lower than the normal ground air pressure, is it because of this reason?

Wang Erzhu is still barely supporting, after all, this is his first time flying, this experience is really bad, but there must be no shame!

"Unbutton, breathe easier, maybe it will be fine." Qin Zhenhua said and unbuttoned his collar.

If the air pressure is low, then untie the mouth and relax.

The button was unbuttoned, Wang Erzhu tried to breathe twice, and he felt a little better, but then, he felt that his stomach was suddenly overturned, and he couldn't hold back anymore.

"No, I'm going to throw up." Wang Erzhu said, stumbling in the direction of the bathroom.

Fortunately, I lived in the guest house of a machine factory for a while, and I can know what is going on with the toilet.

"I'm sorry." Qin Zhenhua followed behind, looking at the washstand on the side, a middle-aged woman was washing her hands there, and when she heard Wang Erzhu's vomiting, she immediately showed a dissatisfied expression, Qin Zhenhua hurriedly apologized, after all, those who can get on the plane must be capable, and their identities are higher than themselves and Wang Erzhu.

The woman snorted dissatisfiedly, and glanced at Wang Erzhu again, at this time, Wang Erzhu was lying there, looking very embarrassed, his neckline had been untied, so lying on his stomach, the back of his neck was exposed, and even a special cyan birthmark under his neck was exposed.

When the woman saw this birthmark, her heart trembled.