The working principle of the electric welding machine is to weld steel by using an electric current to heat the electrode with a resistor.

For Zhang Ran, this welding machine also looks like it has a high degree of technology, so I'm not sure if it exists now.

The reason why Zhang Ran's first thought was to ask Gao Jin to help him buy an electric welding machine, mainly because of the fragments of the steam engine he brought back last time.

Although after various screws reinforced, and the outside with a thick layer of clay with bluestone strips sealed, the steam engine has barely worked, but every once in a while, either there is a leak here or there is insufficient pressure, and Zhang Ran is too annoying, so I thought how good it would be if there was an electric welding machine to re-weld again!

Therefore, after Gao Jin courted himself, when Zhang Ran opened a list of things that needed to be purchased to the other party, in addition to conventional medicines, rubber and other things, he tentatively asked if there was an electric welding machine by the way.

Who knew that Gao Jin didn't say no, but said that it wasn't difficult to get that thing, but it would be very expensive!

This made Zhang Ran overjoyed, and immediately said that no matter how much money it was, he would get this thing back!

After all, as long as there is an electric welding machine, it is not just a matter of re-welding the fragments of the steam engine - it is very useful!

It's like dealing with bunkers now.

The biggest difficulty in dealing with the watchtower, one is how to approach, and the other is how to pry open the turtle shell to eliminate the devil puppet army in the watchtower!

How to approach the watchtower, in fact, it is easier to do!

Stacking an earthen tank with steel plates is enough to cope with in general!

On the contrary, after approaching the watchtower, how to eliminate the desperately resisting devil puppet army in the watchtower is actually the most difficult aspect!

Like before, risk your life to blow up with explosives, then every time you hit the bunker, it is estimated that there will be casualties!

In the end, you may still be able to destroy the devil, but you have more people than the devils, so it is purely a thankless task to kill 800 enemies and lose 1,000 yourself!

But with the electric welding machine, there are more tricks that can be played!

First, weld a cylinder with an electric welder to make a flamethrower – just like the thing the Yankees carried when they attacked the watchtowers a few years later!

As soon as you get close to the watchtower, give him a spray on the little devil first!

If the little devil continues to resist stubbornly, he will spray him again in the watchtower......

Pu Yuanzhong and Long Xin, who had never heard of the electric welding machine, were even more confused when they heard the flame thrower like this......

"You haven't seen a flamethrower, you've always seen a fountain, right?"

For the sake of Long Xin's face, Zhang Ran patiently explained: "The difference is that the flamethrower is farther away than the fountain, and it sprays ignited gasoline instead of water......

Before they finished speaking, Pu Yuanzhong and Long Xin's faces turned pale and hissed and inhaled cool air!

The effect of the flamethrower they have never seen, but can imagine!

Being burned alive is one of the worst ways to die in the world......

"It's the devil who burns, what are you worried about?"

Zhang Ran rolled his eyes and said: "Could it be that you still think that the little devil died too miserably, and you can't bear it?" ”

Pu Yuan Zhonglong Xin snorted in unison, saying that they didn't care how miserable the little devil died, but the thought of being burned alive made him feel extremely uncomfortable...... I can't help but look like I'm hairy.

Then I can't wait to see the finished product.

It's a pity, as Zhang Ran said, whether these things can be made or not, the key is not on their side, but when the welding machine will be procured back!

When sending Pu Yuanzhong Long Xin away, Zhang Ran felt that the two of them looked at him a little strangely—like they were looking at a sinister villain......

What Pu Yuanzhong thinks of himself, Zhang Ran doesn't care.

But Long Xin looked at herself like this, which made Zhang Ran very hurt - who am I doing this for!

The principle of flamethrower is simple to say, but it is not simple at all!

The flamethrower used by the Yankees a few years later consisted mainly of an oil tank, a compressed gas tank and a nozzle.

The compressed gas tank is filled with compressed nitrogen, and the oil in the oil filling is not only gasoline, but the fuel prepared with special ingredients, and the injection distance can generally reach twenty or thirty meters!

The role of the flamethrower is not only to burn, the high temperature burns to make the enemy lose the ability to resist, but also under the high temperature and fierce burning, it can also evacuate the oxygen in the small space of the fortifications in a very short time!

Even enemies who are not directly burned will be suffocated to death because the air is drained!

A few years later, when the Yankees officially entered the war and launched a landing operation against Japan, the Japanese army used the island chain to build countless pillboxes in an attempt to block the Yankees' offensive.

These fortresses are much stronger than the watchtowers built by the little devils now, and they can't be bombarded by heavy artillery!

But the Yankees used flamethrowers to pull out eight bunkers in two minutes!

In the end, as soon as the little devil saw the Yankees coming with a flamethrower on his back in the watchtower, the blockhouse didn't dare to stay, and rushed out directly to fight hard, preferring to be killed by the Yankees' indiscriminate bombing than to shrink in the watchtower and be burned to death......

It can be said that this thing is definitely a weapon for attacking the fortress!

But obviously, the flamethrower made by the detachment is obviously impossible to achieve the same effect as the flamethrower made by the Yankees.

It's very simple, the Yankees' industrial level is enough, they can make high-strength alloy cylinders to store compressed nitrogen, so as to increase the distance that the flamethrower can spray, and on the detachment's side, the entire seamless steel pipe has lost grandma's strength, and the most industrial is Zhang Ran racking his brains to build a forging machine, and nothing else!

If the detachment uses electric welding and its own casting technology to carry out compressed gas in cylinders, I am afraid that if the flamethrower is not made, the cylinders that store compressed gas can explode by themselves first!

Therefore, what the detachment can do is a simple version!

You don't need to spray too far - the Yankees' spray is twenty or thirty meters, and the detachment can spray more than ten meters, and Zhang Ran is satisfied!

However, although the problem of cylinders cannot be solved, the fuel used by the Yankees thickens gasoline, Zhang Ran thinks, can still be done!

Regular gasoline can also be used, but the power is still almost meaningless!

But thickened gasoline is a different story!

Once it is glued to the body, it is a burn close to the bones, and it is not over if it is not burned out!

Moreover, when thickened gasoline is burned, it can also produce thick smoke and cause poisoning such as magnesium and phosphorus......

"The flamethrower can be made of a simplified version, but this thickens the gasoline, and the simplified version must not be used!"

Zhang Ran slapped his palm fiercely, and immediately went to find Deng Fang excitedly, looking forward to his flamethrower coming out, and the little devil was scared, and the little devil no longer dared to shrink in the watchtower when he saw the guerrillas, and rushed out to die......

Just think about it......

Zhang Ran felt that it was very beautiful!

Thickened gasoline, in fact, is napalm gasoline, which is a gelatinous gasoline after adding fatty acid aluminum soap and naphthenic acid aluminum soap.

Gasoline is not a scarce item for the detachment at the moment.

Because when the detachment uses coal tar to refine various chemical substances, it can purify some gasoline, and the power engine of the detachment generally uses diesel, and the refined gasoline is useless at present, and it is all stored!

Not to mention, the flamethrower is not a gasoline-burning machine, and it doesn't use much gasoline at all!

After Deng Fang took Zhang Ran to the chemical warehouse, and saw the various chemicals placed in the warehouse, Zhang Ran had to sigh, the coal tar produced by coking is simply a chemical panacea!

In addition to a very small amount of chemicals in this warehouse, which were purchased and collected by Ren Haifang Kelangzi and the Eighth Route Army, the rest of the dozen or so chemicals, such as naphthalene, phenanthrene, fluoranthene, pyrene, acenaphthene, anthracene, -methylnaphthalene, carbazole, etc., are all purified by coal tar refining!

But what Zhang Ran needs is not these things, but several chemicals such as fatty acid aluminum soap and naphthenic acid aluminum soap.

Only when these chemicals are added will the liquid gasoline take on a gelatinous form, thus achieving the effect of napalming......

When he first came, Deng Fang, a chemical expert, was already a little rusty because he had been idle for many years.

But after countless practices in the past year, and Zhang Ran's two knives were simply unreliable, Deng Fang had to rack his brains in various aspects, and finally solved the preparation of countless chemicals on his own......

Therefore, whether in theory or practice, Deng Fang, a chemical expert, has definitely upgraded in all aspects in more than a year!

It can even be said that the knowledge he has learned over the years in foreign countries does not add up to what he has learned in more than a year of practical operation!

Therefore, after Zhang Ran searched his intestines and scraped his stomach to indicate that the aluminum naphthenate soap was a yellow viscous solid character, which was formed by the reaction of sodium naphthenate soap aqueous solution with aluminum sulfate aqueous solution, he waved his hand to indicate that he could roll......

"Can you do it alone?"

Zhang Ran said that if he stayed, maybe he could think of more things, and maybe he could provide some constructive advice!

"With the level of your two knives, staying can only be trial and error, how can you help?"

Deng Fang pointed to a group of chemical apprentices behind him and said: "Anyway, it's all trial and error, let them help, it's much more reliable than asking you to help - get out of here, out of sight and out of mind!" ”

“……”

Zhang Ran could only get out, looking up to the sky and sighing speechlessly, he couldn't tell whether he was disgusted or was killed by a group of natives who crossed the river and demolished the bridge to unload the mill and kill the donkey!

The kind of feeling that is as anxious as a dog before masturbation and is ugly after masturbation is simply ......

"As soon as I am a crosser, how can I be useless - I will be useful when the sky wears me!"

Zhang Ran quickly cheered up and said that he couldn't let Deng Fang look at him!

I don't need myself here, I can still teach Niu Da how to build a tank!

God asked me to come over and help you natives fight devils, how can it be useless?

How can it be!