Everyone agreed to go to the operation site of the super giant shield machine to find out, but there was only such a mysterious order in the main control crystal brain of the big iron plant. The refining of the oscillating iron teeth and percussion bits had just begun, and there was no coordinate of where to send them after the refining was completed.

Li Yao estimates that Wu Yingqi or Li Linghai have no reason to share such a confidential matter with "three surnamed slaves" like Li Minghui. Li Minghui's iron works only need to be responsible for refining the consumable parts, and the later transportation work should be undertaken by the elite of the imperial army.

Even the elite of the Imperial Army may not know where to send the refined consumables at this moment. Only a few senior officials and confidants, such as the "moon demon" moon matchless, know.

Although he did not know the exact coordinates, Lee could roughly infer.

"The large iron plant is just a very common complex of mining, smelting, energy and refining. Although it is large in scale, its technology content is not high."

Li Yao pondered, "look at these technology transfer agreements and expert guidance manuals. These things are enough to show that it takes a lot of manpower, material resources and time to refine qualified consumable parts. It takes a lot of effort to upgrade the assembly lines of several main magic components in the large iron works.

"In the underground world, there are many heavy industrial towns, such as the big iron factory, which have higher technology content and more complete facilities than here. Even though the ore veins here contain a variety of rare metal components, there is still a considerable gap between the demand for oscillating iron teeth and percussion drills, so many raw materials have to be transported from the outside world.

"Then, why did Wu Yingqi and Li Linghai choose such an" ordinary "underground heavy industrial town to refine and process their necessary consumables?

"I think the only answer is distance and transportation - the place where they carry out secret operations must be not far from the big iron plant, and there must be tunnels or mines that can be directly reached, which can transport a large number of expendable parts unimpeded."

"Even so, the search scope is too large."

Long Yangjun said, "the underground rock is no more obvious than the ground world. Nothing can be seen at a glance. The mind is often blocked by rocks and disturbed by spiritual veins. It is extremely time-consuming and painstaking to thoroughly search every mine cave, tunnel and crevice within a radius of hundreds or even thousands of miles.

"Don't forget, Wu Yingqi and Li Linghai will conquer the last stronghold of the four emperors and Marquises' family in tianjixing at any time. Once they really control the whole imperial capital, it will be at least 100 times more difficult for us to escape!"

"It's a big problem, let me think about it... Yes, shock!"

Li dazzled and said: "I don't know that Wu Yingqi and Li Linghai have controlled several super giant shield machines to dig and explore underground - at least three or five of them, right?

"When the shield machine smashes and annihilates the rock, it will make deafening noise. Of course, it will also transmit all kinds of vibration waves, let alone three or five super giant shield machines working at the same time!

"Since we are sure that their distance is not too far, as long as we lock their vibration waves, we can find them by following the path!"

Long Yangjun thought for a long time, and said: "it's a good idea, but there are countless vibration waves in the underground world itself - the vibration from the air circulation system and cooling system of underground towns, the rumbling noise from the shield machines of other towns and factories, including the natural seismic waves from weak geological changes... Thousands of intricate waves entangled together, How do you lock in the vibration ripple of the super giant shield machine? It's like finding a drop of water in a flood! "

"Not necessarily."

With a smile, Li Yaowei said, "mountain people have their own tricks!"

Long Yangjun looked at him without saying a word.

Li Jialing also frowned at him.

After a long time of unfathomability, Li Yao was disappointed to see that no one picked on him. He said, "at this time, shouldn't you say 'Oh, the stratagem will work out'

Xiaoming and Wenwen sighed: "Dad, time is pressing. If you have a way, just say it. Don't play!"

"It's like this --"

Li Yao scratched his chin for half a day, coughed awkwardly, and said, "the vibration frequency between waves is not the same, just like the sound of an earthquake is different from that of a volcanic eruption, and even more different from the sound of the normal operation of magic weapons in cities and towns.

"The same is true for shield machines. Small shield machines with a diameter of less than 10 meters and large shield machines with a diameter of 20 meters or 30 meters must have different sounds of crushing rocks!

"The noise emitted by the" super giant monster "with a diameter of 100 meters on the working face must be extremely special and discernible. Even though it has passed hundreds of kilometers in the rock stratum and the vibration wave attenuation is very small, some basic characteristic parameters will never change.

"You see, in these technology transfer agreements and expert guidance manuals, the performance parameters and refining methods of the oscillating iron teeth and percussion bits are recorded in detail. Then, according to the characteristics of these consumer parts and the design method of imperial conventional shield machine, we can model in the crystal brain and" deduce "the whole picture of this super giant shield machine, And calculate it in the operation of the sound, exactly contains what kind of characteristics!

"As long as we can grasp its ripple characteristics and compare them with the vibration ripples we collected one by one, won't we catch them?"

"Wait a minute --"

Long Yangjun asked, "there is not only one way to refine the shield machine, including the working principle of the shield machine. How do you go back?"

"It doesn't matter. When the volume and working face of the shield machine expand to a certain extent, there are only a few construction methods available. I can model and calculate them in several different ways."

Li Yao grinned and said, "at that time, we can get dozens of different wavy features to form a feature library, and then grab all the wavy features we collected to compare, can we always find similar ones?"

"That's quite a lot of calculation, isn't it?"

Long Yangjun said suspiciously, "are you sure you can?"

Li Yao took a look at the two little guys and said confidently, "maybe not in the past, but now... There should be no problem!"

Once Li Yaoxin swore, everyone would not hesitate.

Although it will certainly waste a lot of time for them to refine the "sonic search and grab" and find out where the super giant shield machine is, it is agreed that it is worth it.

Wu Yingqi and Li Linghai are powerful. They can't be defeated by confrontation. The identity of "black star emperor" is not really invisible. Even if they can escape from the imperial capital to "expose Wu Yingqi's true face", it seems that there is nothing to expose.

Even, it may be counterproductive. For example, he ran to the "God of war" Lei Chenghu to "expose Wu Yingqi's true face". Maybe Lei Chenghu was overjoyed and screamed to rush to Wu Yingqi.

Therefore, they must master the black star Emperor Wu Yingqi's card, at least to see what this card looks like, after escaping from the imperial capital, they can have the game capital.

After the consensus was reached, Li Yao and the two little guys focused on the modeling and calculation of the super giant shield machine.

After all, the shield machine is a civil magic weapon. No matter how big the volume is, the structure has not changed in essence. Compared with the military magic weapon, it is not complicated. For Li Yao, who has disassembled and refitted no less than 20 or 30 giant magic weapons, it is a piece of cake, not to mention - what's more, there are two small guys with extremely huge database to help!

It took them a lot of effort to refine the magic weapon of "vibration wave scanning and grasping". The main reason is that the accuracy requirements are too high, and many components must be polished one by one by Lee Yao himself.

From modeling, calculation to magic weapon refining, it took more than 20 hours before and after refining a strange magic weapon.

In fact, it's not "refining". It's just a patchwork of search magic weapons from the giant warrior. Time is pressing, and it doesn't care about the layout and appearance. At first glance, it looks like a mess of metal cow dung, but four huge metal bowls are stretched out, which are buckled one by one on the relatively smooth rock wall by Li Yao. First, the air inside is drained, and then injected with his specially prepared, A highly sensitive gas acting as a conducting medium.

"Bobo, Bobo, BoBo!"

"Drop by drop!"

"Doodle, doodle, doodle!"

When he holds his breath and gradually injects his power into the magic weapon, pushing the sensitivity to the limit, hundreds of waves in the rock layer are released immediately, interwoven with absolute noise that the human ear cannot distinguish.

Li Yao patiently input these "noises" one by one into the ripple feature library deduced by him and the two little guys. Sure enough, he soon found a slight downward 20 degree azimuth in the southwest. There was an extremely weak ripple, and the coincidence rate of one of them in the feature library was more than 95%!

"You see, this zigzag structure with overlapping waves shows that there is more than one sound source, which was produced by several super giant shield machines working together."

Pointing to the three-dimensional model of the ripples, the peaks and troughs, Li Yao explained to long Yangjun and Li Jialing, "what's more, every three and a half minutes, the oscillating ripples fall to the bottom of the valley, and it will take about two minutes before they gradually rise and reach the peak in two minutes - this is obviously the cooling time of the super giant shield machine.

"According to my calculation, the operating temperature of such a super large shield machine must be extremely high, and it is impossible to continuously drill and crush. The limit is three and a half to four minutes, and then it must be cooled for two or three minutes before the second round of operation.

"All the features match one by one, so this place is our goal!"