When Gao Ninghai heard this, he couldn't help but be stunned and asked, "What is something simpler than this?" ”

Lin Yuan said: "The first step in missile design is to analyze the characteristics of the target, and the target of the ground-penetrating missile is the rock on the ground, which is the same as the target that our drilling equipment needs to deal with!" Therefore, I hope that you will apply your experience in analyzing the mechanical properties of rocks to the design of drill bits. ”

Gao Ninghai nodded and said: "I understand, whether it is penetrating with missiles or digging with a drill bit, it is the destruction of the rock, and it is the same in terms of material mechanics theory, how to design the drill bit, I almost thought of it." ”

Lin Yuan said: "The hardness of the drill bit material must be very high, and our power generation equipment is already in preparation, and when the arc steelmaking furnace starts to run, we will be able to produce high hardness manganese steel, and at that time, our drill bit material will be available." ”

Lin Yuan said: "Everyone must have thought that when our drill bit crushes the rock underground, a large amount of debris will be formed, and they will block the front of the drill bit and prevent the drill bit from advancing, so ......."

Speaking of this, Lin Yuan turned his head to look at Su Zhengming and said with a smile: "Old Su, your profession should be played." ”

Su Zhengming was stunned for a moment and said, "What does this have to do with my major?" ”

Lin Yuan said: "The rod behind the drill bit is empty, there are small holes on the drill bit, we need to add the mud from the rod, in the process of drilling the drill bit, the mud will be sprayed out from the small hole on the drill bit, and the mud will come out of the drill pipe and the stone wall with debris, and our drill bit can continue to drill." ”

Lin Yuan continued: "These muds are not made at random, they need to have a good stickiness, so that the debris can be brought up from below, which is the category of non-metallic materials." ”

Su Zhengming thought for a while and said, "As long as I know the composition of the detritus, it is not too difficult to make such a mud. ”

Lin Yuan looked at Zhou Huaxin again and said, "Old Zhou, it's time for you to play now, you need to design a pressurization system for these muds, they have to go into the ground hundreds of meters deep and then return to the surface, so the pressure required must be not small." ”

Zhou Huaxin said: "We can use air to propel them, such an air nozzle design is not difficult, but we need power, the existing electric motor equipment, I am afraid it is not enough to complete this task." Lin Yuan said: "Academician Liao Ming is modifying the turbofan-30 engine, I asked him to modify one more, specifically for your use, you only need to design the air nozzle." ”

Zhou Huaxin smiled: "With the help of the turbofan-30, there is no problem!" ”

Lin Yuan said with a smile: "Okay, Liu Lao is responsible for the materials, and I hope everyone will complete the design as soon as possible." After everything was ready, Lin Yuan ordered the troops to block the land within a radius of ten square kilometers of the Liaohe Oilfield and set up an oil industrial zone, but because the oil industry was still in its infancy in the world at this time, Lin Yuan did not want too many people to know about it, so he declared that this industrial zone was a paleontological research center. Lin Yuan arranged the affairs of the petroleum industry properly, and finally breathed a sigh of relief, since then, electric power, petroleum, iron and steel metallurgy has been initially established, plus the inorganic chemical plant moved from the Ryukyus, which can be regarded as laying a good foundation for the establishment of a modern industrial system.

Just when Lin Yuan was planning the next step of development, a master sent a document, looked through it, and it was written: Heavy rain fell in the lower reaches of the Songhua River, and the river between Sanxingcheng and Lahasusu swelled, and the river overflowed out of the river and flooded a large area of land. ”

Lin Yuan saw that it was a flood, and he was not worried, and asked, "Did there be casualties?" ”

Master said: "Your Excellency, please relax, this area is all wasteland, and there are no people living there, so there will be no casualties." ”

Lin Yuan thought to himself: "It's a pity that such a good cultivated land is wasted like this. Suddenly, a terrible thought came to him, and Lin Yuan said to his master: "I'm going to go out for a while, no matter who comes to me, they will say that I'm sick and won't see any guests!" Do you know the way? ”

The master reluctantly agreed, Lin Yuan hurriedly led people to the city of the three surnames, the reason why Lin Yuan left in such a hurry was because he thought: The Russians are very likely to take this opportunity to counterattack Lahasusu!

Although the Russians were defeated by Lin Yuan's troops in Jilin and Heilongjiang provinces, they still occupied key strongholds in the mountains, among which the Wandashan fortress group was behind the side of Lahassusu, and if the Russian troops there were dispatched, it was very likely to cut off the connection between Lahassusu and the three surnamed cities.

Lakhasusu is only separated from the Russians' Khabarovsk by a river, and the Russians have hoarded heavy troops in Khabarovsk, ready to counterattack at any time, and the Russians counterattack Lahassusu has a more important reason, that is, this city was captured by Lin Yuan during the negotiation with the Russians, and the Russians have been holding a bad breath!

The reason why the Russians did not dare to counterattack easily was because in the city of Sanxing, there was a powerful inland river fleet, which was named after the place and called the Songhua River Fleet, on the basis of the original four Russian gunboats, Wan Ling led the craftsmen of the Jilin Machinery Bureau to build twelve new gunboats, which were equipped with captured Russian 75 mm rapid-fire guns, and the firepower should not be underestimated.

The Songhua River flows from the south of Lahassusu, and then turns northeast and flows into the Heilongjiang River to the north, so that whether it is the Russian army in the Wandashan fortress or the Russian army in Khabarovsk, if they want to attack Lahassusu, they have to pass through the Songhua River fleet.

However, this heavy rain made it impossible for the Songhua River fleet to support Lahasusu!

At this time, the city of the three surnames has become the core of the fight against the Russian army, the Songhuajiang fleet and the second brigade of the first division are stationed here, as soon as Lin Yuan arrived in the city of the three surnames, he contacted the first battalion of the second brigade of the first division stationed in Lahasusu, and the battalion commander was a squad leader of the Marine Corps, named Zhang Yao.

When Zhang Yao heard that it was Lin Yuan, he hurriedly reported and said: "Yesterday, we found a small reconnaissance unit of the Russian army of twelve people in the southern suburbs, and we ignored it!" ”

Lin Yuan was just about to speak, but he heard an anxious shout from Zhang Yao's side: "Battalion commander, five kilometers south of the city, a large number of Russian troops were found, and the number was more than three thousand!" ”

When Lin Yuan heard this, he hurriedly ordered: "You guys immediately prepare to withdraw to the Three Surname City!" Give up Rahasusu! When Zhang Yao heard this, he said in surprise: "Captain, although we didn't make much effort to defeat Lahasusu, but just give up, isn't it a pity?" ”

Lin Yuan said: "There's no pity, do you think, when you hit the enemy, do you withdraw your fist first, and then hit it to be powerful, or to hit it straight and strong?" ”

Zhang Yao said: "Of course, it is powerful to take it back first, but it is ......"

Lin Yuan said: "I asked you to retreat, just to withdraw your fist!" ”

Zhang Yao said: "You can't withdraw!" There are more than 30,000 people in the city! ** The son has broken through the city, aren't these ordinary people finished! ”

Lin Yuan didn't think of this, he knew that if he held on, this battalion of more than 500 people would probably be wiped out without support, and if he retreated, more than 30,000 people in the city would be slaughtered!

Lin Yuan thought silently: "Can you let the Songhua River fleet risk through the flood?" ”