Lin Yuan returned to the headquarters and led the troops to Hunchun City, the old demon ridge was only twenty kilometers away from Hunchun City, and there was a flat river in the middle, and there was no danger to defend, so Lin Yuan led the fourth division to a place about ten kilometers away from Hunchun City and set up camp.

Lin Yuan had been pondering the mysterious fortifications that Lavrov had said, and he thought to himself: "This guess will definitely not lead to results, so it is better to go outside the city and have a look." ”

Lin Yuan then called Chen Fei, took a few more soldiers, and rode fast horses to a small dirt slope outside the city defense, Lin Yuan and Chen Fei got off their horses, hid behind the dirt slope, and looked in the direction of Hunchun City.

I saw that in the open space in front of the city wall, there were three barbed wires, and behind each barbed wire was a trench, and from time to time Russian soldiers walked around in the trenches.

Chen Fei looked at the barbed wire and said, "It's strange! ”

Lin Yuan asked, "What did you find?" ”

Chen Fei pointed to the barbed wire and said, "Look at those barbed wires, how can the bottom wire be so high from the ground?" Lin Yuan shook his head gently, and Chen Fei asked Lin Yuan again: "What did the brigade commander say to you?" ”

Lin Yuan said: "He told me that the Russians have a new type of fortification, which can burn people to death, and it was built by an American named Nikolai, which is still very mysterious. ”

Chen Fei smiled disdainfully and said: "I think that brigade commander is just making up nonsense, what kind of mysterious fortifications are there, isn't it just trenches and barbed wire, I think it is far worse than what the Japanese built outside Fengtian City." ”

Lin Yuan asked, "Do you think our bazookas can blow up their barbed wire?" ”

Chen Fei looked at the barbed wire fence and said: "It's hard to say, the effective distance of our bazooka is too close, only more than 200 meters, and the front of the barbed wire is all open ground, so it is difficult for bazooka hands to get close; In addition, the charge of the rocket is relatively small, and if it cannot directly hit the barbed wire, it will not cause any major damage to the barbed wire. ”

Lin Yuan asked, "Then how do you think we can break through their barbed wire?" ”

Chen Fei said: "If people can get closer, cutting it is the best choice. ”

Lin Yuan nodded, and Chen Fei said to himself: "What kind of fortifications can burn people to death, do they also have flamethrowers!" ”

When Lin Yuan heard Chen Fei's words, he suddenly said, "I thought about what was going on!" ”

Chen Fei hurriedly asked, "What do you think of that mysterious fortification?" ”

Lin Yuan pointed to the barbed wire fence in front of him and said, "This barbed wire fence is very likely to be electrified!" ”

Chen Fei cried out in surprise and said, "Electrified!" How is this possible! ”

Lin Yuan said: "You see, the bottom of the barbed wire fence is relatively high from the ground, probably because of the fear that an animal will hit the net; When an electric current electrocutes a person to death, due to the thermal effect of the electric current, it will leave a trace of fire on the human body, so the brigade commander said that the fortifications can burn people to death. ”

Chen Fei asked again: "What about the American named Nikolai?" ”

Lin Yuan said: "If you want to electrocute people on the power grid, the voltage is low, if you use direct current, if you want to raise the voltage too high, although the technical difficulty is not large, but it is not economical enough, so it is an excellent choice to use alternating current, because alternating current can produce mutual inductance, and you can use a transformer to increase the voltage." ”

"If I'm not mistaken, the American named Nikolai is likely to be the inventor of alternating current, Nikola Tesla!"

Chen Fei thought for a while and said, "Your analysis is very reasonable, but I have a question, if these barbed wire fences are really power grids, then they need to purchase generators and transformers, and these investments are too much!" ”

Lin Yuan pointed to the Russian position with his hand and said, "Have you seen it, the number of searchlights on the Russian army's position has increased significantly compared to before." ”

Chen Fei said: "I noticed it at first sight, is there something wrong? ”

Lin Yuan said: "Many of our previous attacks were launched at night, and our troops' ability to fight at night was also unstoppable, so the Russians were scared, so they set up a lot of searchlights on the position, and these electricity can also provide energy for searchlights." ”

Looking at Chen Fei nodded, Lin Yuan said again: "The greater role of these power grids is psychological warfare, how many Chinese in this era have seen electricity?" I have never seen a live barbed wire, so the Russian army thought that we would be very frightened when we saw the power grid, so they laid the power grid. Chen Fei nodded and said, "These are all your guesses, we have to think of ways to verify them!" ”

Lin Yuan looked around and said, "Let's go find a transformer, the volume of the transformer must not be small, as long as we find the transformer, we can conclude that this is the power grid." ”

After Lin Yuan finished speaking, he led everyone to walk along the power grid to both sides, and sure enough, after walking a few steps, he saw a square-shaped iron box, Lin Yuan pointed to it and said: "That's the transformer, and there is a chimney in the house next to it, and the generator must be there." ”

Chen Fei said: "Then we will blow up their transformer first, and as soon as the power on their power grid is cut off, we can find a way to cut his barbed wire." Lin Yuan picked up the telescope, measured the distance with the secret ruler inside the telescope, and said: "Within the range of our mortar, but there is no way to guarantee the accuracy!" ”

Chen Fei said: "We don't know how thick the iron box is, maybe our mortar shells can't blow it up even if they hit it directly." Lin Yuan thought for a while and said: "There is a way, the transformer will emit heat when it is working, so there will be heat dissipation holes on the iron box, and we will use this to make new weapons and destroy the power plant of the first child." ”

As soon as Chen Fei heard about the new weapon, he immediately became interested, and hurriedly asked what kind of weapon it was, as soon as Lin Yuan told him, Chen Fei suddenly realized. Back at the headquarters, Lin Yuan found Liu Yufeng and said, "There is a Mopan Mountain near Jilin, have you heard of it?" ”

Liu Yufeng said: "Of course Xia Guan has heard of it. ”

Lin Yuan said: "You bring more people and go there to buy two hundred catties of graphite and come back." ”

As soon as Liu Yufeng came out, Lin Yuan came to the artillery battalion of the Fourth Division, which was equipped with the latest 82-mm mortar, and its performance was much stronger than the original 60-mm mortar.

Lin Yuan found the battalion commander Zhang Shouen and asked, "What kind of explosives are in the warheads of our shells?" ”

Zhang Shouen said proudly: "Listening to the people in the arsenal, the explosives contained in it are 60 percent black sokin and 40 percent TNT, and they say that the power of this mixed explosive is the leading in the world!" Dozens of times stronger than the shells of the British! ”

Lin Yuan smiled and asked, "Is there anything with black powder?" ”

Zhang Shouen asked hesitantly: "What are you looking for such shells?" ”

Lin Yuan said: "You just find such shells, find a few more skilled gunners, and I will teach you to make brand new shells in a while." ”

Zhang Shouen had long heard that Lin Shuai was proficient in various skills, especially in the development of weapons, and now that he could see his magic skills, he was naturally extremely excited.

Mopan Mountain is in today's Panshi City, Jilin Province, is a famous graphite production area, Liu Yufeng took people to ride fast horses, rushed back overnight, and found Lin Yuan back and forth, and said: "As soon as I said that I was your subordinate, the graphite seller didn't ask for money, so he gave me three hundred catties!" ”

At this moment, Zhang Shouen also took the cannonball with everyone, Lin Yuan pointed at the cannonball, and said with a smile: "Take it apart." ”