In addition to the gold and jade, the story of defeat has been known since ancient times.

When those little devils saw that they couldn't take it away, they directly used explosives to detonate the damaged artillery fire, and the reason why it could not be repaired and used was similar to the reason why Jin Yu was defeated outside.

On the surface, it doesn't seem like a big problem, but the hidden cracks caused by the explosion go deep into it.

The repair of the blacksmith's workshop can only repair the distortion of the surface at most, and there is nothing that can be done about these hidden cracks.

When the artillery fire is used, it will produce extremely strong chamber pressure, and these cracks that cannot be repaired will become time bombs in the artillery, and I don't know when it may explode because the chamber pressure exceeds the limit of its bearing!

This is the reason why Gai Heiliang is resolutely opposed to the use of the 92-step cannon after repair.

Of course, although this ninety-two step cannon cannot be directly repaired and used, it still has a very high value for Gai Heiliang!

When Zhang Ran arrived at the back mountain, Gai Heiliang was lying on the cannon body bare-chested, constantly measuring various data, and on the table next to him, there was already a thick stack of papers, all of which were collected from the ninety-two step gun......

Seeing this scene, Zhang Ran smiled!

In history, Gai Heiliang is famous for imitating the artillery fire of the little devil, it seems that even if because of his arrival, the trajectory of history has shifted slightly, but Gai Heiliang is still imitating instead of developing his own artillery fire, and there is still no change.

"Team Zhang, Niu Da, you sit down first, I'll come when I'm done here!"

Seeing Zhang Ran coming, Gai Heiliang said a word, and then continued to work on his own affairs.

"Dog's day little devil, such a good thing, I'd rather blow it up than give it to us, it's so hateful......"

Niu Dacheng Dongshan and the others cursed stupidly, and their eyes were red when they looked at the artillery fire-because they had really experienced the battlefield and seen the power of real artillery fire now!

Therefore, how powerful the artillery fire they felt, how heartbroken it was for the soldiers to be bullied by the little devils with cannons!

Now that I finally have a cannon that looks like it can be used, but it can't be used, not to mention how uncomfortable it is......

"Captain, do you think we can use the method of hitting the barrel of a grenadier to hit this mountain artillery?" Niu looked at Zhang Ran with wide eyes and asked.

Zhang Ran glanced at Gai Heiliang and said, "What did the cover worker say?" ”

Niu fed and rolled his eyes, and Gai Heiliang, who was busy, said angrily: "Niu Gong, didn't I tell you, this mountain cannon and the grenadier are not the same thing - the grenadier cannon will not produce any chamber pressure at all, so you can use the cannon barrel by hand, but the pressure generated when the mountain cannon is fired is not much less powerful than the explosion of directly stuffing explosives into the cannon barrel...... Hit a real cannon by hand, that is to find ...... death"

"I haven't tried it, how do you know it can't be done?"

Niu puffed out his eyes and said: "I see that you clearly can't believe the technical level of our sheet metal workshop!" ”

"The builder is an expert, listen to the builder!"

Zhang Ran saw Niu Da's expression and was busy comforting him, and at the same time he was a little puzzled, saying that Niu Da didn't look at this person as tall and big, but his temperament has always been quite generous, and he has been in the detachment for more than a year, and he has less time to blush with people, why is it the same as taking gunpowder now?

But when he thought about it, he was relieved again!

In this battle, the detachment suffered thousands of casualties, and he was holding back an evil fire in his heart.

Not to mention that when he was fighting Dingzhou, Niu Da also went to the battlefield by himself, and watched the militia soldiers around him be blown to pieces by the artillery fire of the little devils, and he also used his scalp to withstand the shelling of the little devils!

Niu Da was afraid of how uncomfortable the battlefield was, so he desperately wanted to get the detachment's own artillery out as soon as possible, so that the soldiers could use the detachment's own cannon to fight against the little devil's cannon, instead of just being bombed......

Now that he has pulled back a cannon that is still in good condition and cannot be repaired, the method he can think of to make the barrel by hand has been rejected again......

Niu Da's mood naturally can't be good!

Seeing that Zhang Ran supported Gai Heiliang's opinion, Niu Da knew that it was impossible for his idea to be implemented, and after saying hello to Zhang Ran, he left angrily......

"Team Zhang, it's not that I don't want the soldiers to use their own cannons, it's really according to the Niu Gong's method, it's really not good!"

Gai Heiliang explained to Zhang Ran: "I am afraid that the barrel made by his method is easier to explode than the cannon repaired...... If the soldiers die at the hands of devils, they will be martyrs, and they will die in the hands of the guns we made ourselves, how unjust do you say? “

"Coverer, no need to explain, I believe in your professionalism!"

Zhang Ran nodded, and then asked, "Didn't we capture three tanks in the hands of the little devil this time?" In addition to the one that can still be used, aren't the remaining two dismantled back? The tank gun on it, can we modify it? ”

"That works!"

Hearing this topic, Gai Heiliang became excited: "The two tanks that were destroyed by us were both incendiary bombs, and although the barrels of the tank guns showed signs of annealing due to the high temperature, the strength was slightly weakened, but there was no structural damage......

I'm already thinking of a way to let Master Niu find a way to requench the barrel to increase strength, and I'm also researching a suitable gun mount! ”

Before Gai Heiliang finished speaking, Mao Zuan and Cheng Dongshan interjected on the side: "The research and development of artillery shells has been carried out by our ammunition department and the second workshop, and we can definitely get the shells out before the tank gun is successfully modified, but our tank gun is successfully modified, and we can use the shells produced by ourselves as soon as possible......"

"Be quick!"

Zhang Ran said worriedly.

Because Gu Tou, surnamed Tang, fled regardless of his heart, Pingtongguan has completely fallen, and now the detachment's base area has become a base area behind enemy lines in the real sense!

In this battle, because of the cooperation of the detachment and the division headquarters, the little devils caught up with more than 20,000 devils in Pingtongguan than in history - this is not counting the Imperial Army!

Even if it is not compared with history, directly counting the battlefield battle losses, there are more than 10,000 little devils who died directly in the hands of the detachment and division headquarters - just when the Jinxian Temple flooded the Seventh Army, there were nearly 5,000 devils, and no more than 1,500 escaped......

With such heavy casualties, Zhang Ran can be sure that the little devil will definitely have hateful teeth in the detachment!

Now, the little devil has just controlled Pingtongguan and is still actively stationed, so he has no time to take care of himself, but once the little devil has gained a firm foothold here, Zhang Ran is sure that the first thing the other party has to deal with is the detachment!

Although the strategy of fighting behind enemy lines is guerrilla warfare, it is to use the advantage of the mountainous area to maneuver with the little devils, rather than blocking the position and not giving up an inch of land.

But Cangshui Dongjiang is the foundation of the detachment, if the little devil really wants to attack the base area, even if the detachment knows that it can't hold it, then it has to defend it and try it, and it will not give up the territory of the base area!

Otherwise, nearly 300,000 people in the two counties of the Jindong detachment's base area will lose confidence in the detachment!

Now, this war between the little devils and the detachment is imminent!

Although it is certainly not as great as the momentum of the first battle of Pingtongguan, but its tragedy, Zhang Ran believes, I am afraid that it is even more than that!

If he had a few cannons in his hand, when he faced the little devil again, Zhang Ran's confidence in this battle would obviously be much more than before......

"Don't worry, Captain, we'll do our best!"

Gai Heiliang and the others obviously had a clear understanding of the situation faced by the detachment, and nodded fiercely when they heard this, indicating that they knew what they were in.

"Lately, I can only work hard for you!"

Zhang Ran patted a few people on the shoulder, and then asked about the details of the tank gun.

The tank gun, which was disassembled from the top of the tank, had a very long gun body, and in order to adapt to the use on the tank, the gun body carried a large number of components, and the weight was extremely large!

I heard that in order to bring back this tank gun completely, it took more than 20 people to bring each tank gun back, and it took seven or eight days of hard work to bring it back.

At that time, it could still be carried by people, but if it really started a war, it was impossible to continue to let the militia and civilians carry it on their shoulders!

And if this tank gun is really refitted, the detachment can only use these two guns, if it can only be used as a battery, then the practicality is too poor, it is simply a violent thing......

"Didn't we build the Dongcang Highway in the base area?"

Zhang Ran said: "My idea is, can we make full use of our highway, get a tractor out, when the gun itself is modified, also take into account this factor, when the little devil really fights, let's use the tractor along the road to pull the cannon, move the battle, maximize the power of the cannon......"

Fortunately, the people present were all skilled workers such as Gaihei Liangcheng Dongshan Wool Drill, not military experts.

Otherwise, when I heard Zhang Ran's words, I was afraid that I would be shocked to drop my eyes!

Extending the mobility of artillery fire and adopting mobile combat is a combat method that will only be adopted by artillery in a few decades.

The reason for this, of course, is due to technology.

Because of the artillery fire, even if it is known for its lightness and dexterity, like the ninety-two rifle cannon that is now placed in front of Zhang Ran, it is two hundred kilograms!

With such a heavy dead weight, it is simply impossible to move and fight - because at the moment, transportation simply does not support this.

However, for the detachment, because of the main trunk line of the Dongcang Highway, the traffic problem was easily solved -- this was also the basis for Zhang Ran's concept of mobile artillery combat tactics.

Of course, it also has a lot to do with the fact that the detachment is not so lacking in power machinery now!

The detachment originally had two car engines, quite a few motorcycle engines, and now two tank engines......

Originally, these power machines needed to be used to support the mechanized production of the workshop, but since the steam engine, these power machines can only exist as auxiliary power, and they can be used as tractors......

Once these two tank guns that can be used in the fastest time can be moved, Zhang Ran believes that the effect will not be less than the help brought to the detachment by having ten or eight guns that cannot be moved......

"yes, why didn't we think of that?"

Although they are not military experts, they don't know how advanced the tactical concept of artillery mobile combat put forward by Zhang Ran is, but Gai Heiliang and the others are not fools, and they immediately understood the benefits, and they stomped their feet excitedly, and immediately began to summarize that in order to achieve Zhang Ran's vision, there are still those problems that need to be overcome!

In terms of tractors, this naturally requires Xu Kunjun's cooperation.

Although building a car is a difficult thing, this kind of tractor is more of a mobile role, without considering comfort or anything else, it is easy to solve with a power machine.

However, in order for the gun to move with the tractor, a lot of work must be done in terms of modification, such as the gun rack must not only be able to achieve the difficulty of cooperating with the tractor at any time, but also take into account the stability of the shooting and other factors......

In short, the amount of work is not small!

But even though they knew that it was as difficult as a mountain, Gai Heiliang and the others still patted their chests and assured Zhang Ran that they and the others would definitely complete the task, and they would gnaw off the hard bone of making the cannon move!

However, although the modification of the tank gun is a top priority, what Gai Hei's conscience has in mind is to imitate the Jiuer Mountain Cannon!

After all, now he also knows that Zhang Ran spares no effort to develop the detachment's military industry, and what he wants is not the detachment's self-sufficiency, but the desire to let the detachment's military industry benefit the entire Eighth Route Army, and even all the anti-Japanese teams that dare to rise up and dare to stand up and fight for their lives with the little devils!

With so many teams, it is impossible to supplement the artillery fire by dismantling the tank gun modification from the little devil's tank - that is simply unrealistic!

And if you can imitate the cannon fire of the little devil yourself, it will be different......

The core problem restricting imitation artillery fire is still in the barrel!

Not to mention that the detachment itself does not have a steel industry at all, even on the side of Yan Laoxi and the chairman of the committee who have a steel industry, the quality of the barrels manufactured is far from up to standard, and often after dozens of rounds, the barrels are scrapped!

This is also the fundamental reason why the current Chinese soldiers not only have no air superiority in the face of little devils, but can only be beaten in terms of artillery fire!

And the detachment, now it can't even make a barrel that will be scrapped after a few dozen rounds, so how can it be imitated?

"Gai Gong, your first task now is to modify the tank gun, and put all your thoughts on not only modifying the tank gun, but also adapting to the mobile combat I said!"

Hearing Gai Heiliang's complaint, Zhang Ran smiled slightly and said: "As for what you said about wanting to imitate the little devil's cannon and not having the ability to make a cannon barrel - I'll figure it out!" ”

"Captain, you've already figured it out?"

Gai Heiliang saw Zhang Ran's expression of the old god and immediately said with joy: "What's the way, hurry up and tell me about ......"

"When you finish the task I have given you now, I will naturally tell you!"

Zhang Ran laughed, he would never tell Gai Heiliang that the method he thought of to make a cannon pipe was still the method he Gai Heiliang had used in history!