Zi Yang followed Lao Wang's gesture and looked up, at this time the top of the cave had been covered by a sandstorm, and the only glimmer of light had disappeared, and the wind and sand blew on the ground and made a sharp cry, floating dust, sand and gravel poured down, and a thick layer had been laid on the ground. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

Lao Wang said, "Timur said that this sandstorm is very large, and it may last for a long time, and after a while, there may be quicksand pouring in, and the entrance of the cave may be buried......"

Lao Wang skillfully rolled up the mountaineering rope he had just used, and continued: "When you went for a walk with Xiao Hei, Su Rui had already used instruments to probe, the caves here extend in all directions, the air is enough for us to breathe, don't worry for the time being, we are going to explore this underground passage, maybe we will find another exit." ”

Lao Wang babbled the above words, and then glanced at Ziyang dissatisfied, the meaning is obvious, everyone is busy working, and you two idle people have nothing to do.

Lao Wang paused for a moment and added: "I really can't find the exit, we can come back again, anyway, we have all the instruments and equipment, and it is not difficult to open the hole - as long as no boulders fall." ”

Zi Yang was no longer silent, obviously when he and Xiao Hei were not there just now, there was a small meeting here.

He knew that now no one listened to him except Xiao Hei, the leadership was no longer in his hands, and Lao Wang had rebelled!

Su Rui said apologetically, "I'm sorry for dragging you to such a situation, if I have the opportunity in the future, I will definitely ......"

Zi Yang raised her hand and resolutely pressed back the second half of her promise: "Life and death are still unpredictable, and we will talk about it later." ”

Now Zi Yang has a sulk in his heart, he blames Alexander for dragging everyone down to such a situation, and even affecting Su Rui, but now that people are lying on the ground and half dead, he is embarrassed to scold him again.

Su Rui saw that Zi Yang's face was gloomy, and he didn't say anything more. I took out a tiny laptop from my backpack, then took out a hair dryer-like instrument, and linked the line at the bottom to the laptop, and soon a grid line full of English and an operation window appeared on the display.

Su Rui half-knelt on the ground, put the notebook on the other knee, turned on the "hair dryer" in his hand, and his head automatically opened a thin octagonal net, Su Rui aimed the net port at the channel and pressed a button.

"Ding......

The "hair dryer" made a screeching sound, although the sound was not loud, but the penetration force was extremely strong, which made people feel uncomfortable when listening. As the sound oscillated, Ziyang saw the green coils on the screen fluctuating.

Su Rui introduced, "This is the 3D stereo sonar detector designed by the doctors for cave exploration, which is located through the echo of sound waves on the wall, and the sound waves will bounce and weaken when encountering obstacles, and the computer collects feedback signals to calculate the distance, shape, and even texture of the obstacles, and then through complex calculations and mapping by software, the entire cave shape is displayed in three dimensions." ”

Ziyang couldn't help but lean forward and ask, "How far can this thing detect?" ”

"The sound waves bounce off the wall and weaken, and the accuracy is proportional to the intensity of the sound waves. The approximate detection range of our scientific portable is about 50 meters, taking into account the size of the cave and the complexity of the terrain. ”

Su Rui then added, "Although the distance is not as far as the engineering and military grades, it is far superior to them in terms of accuracy. You see, according to the density, thickness, and twisting of the coils on the screen, you can clearly see the contours in the cavity by comparing the parameters. ”

While the two were talking, the computer software had drawn the sound of the sound waves back back with lines after precise calculations, and everyone looked at the computer screen, and the green lines were intertwined.

"I didn't expect this thing to be so small and so useful." Zi Yang saw that the volume of this hair dryer was the size of an electric fan when it was opened, but Su Rui looked very light when he picked it up, holding the computer in one hand and the detector in the other, which was effortless at all.

Su Rui said, "Some of these instruments are made of carbon fiber and ceramic materials, and the main materials are aviation metals, which are small in size and light in weight. ”

Zi Yang tossed it with his hand, and sure enough, the black instrument looked heavy, but it was extremely light in his hand. I can't help but sigh in my heart, the black technology of foreigners is really breathtaking.

Lao Wang next door was muttering beside him, "A little bit, a little light, we can't afford to pay for such a valuable thing if it is broken." He glanced at the computer screen and said repeatedly, "Good girl, the drawing is so clear, such an awesome thing, can it be sold for a lot of money?" ”

Su Rui smiled slightly and didn't answer him.

Zi Yang pointed to the end of the computer screen and said, "You see that the signal seems to have weakened a lot here, and the coils in other places are closed, but not here, it's a bit chaotic and very vague." ”

Su Rui nodded and said, "It means that the passage here has not yet reached the end, and the sound waves will gradually attenuate in the air, and if there is no obstacle after passing through, it will slowly weaken until it disappears." This unclosed state will be displayed on the computer screen. ”

The old man next door patted his ass and stood up and said, "Then what are you waiting for, let's open the road, explore while walking, there is such a powerful thing in your hand, you can walk boldly with your eyes closed - I think, let's turn off this headlight and replace it with a small flashlight, in case the power runs out, it will be embarrassing." ”

After everyone came down, Su Rui turned on an LED headlight, this light is like a helmet, the size of Lao Wang's head, the design is very ingenious, it can be carried by hand, and the light can diverge 360°, illuminating the entire cave ** clearly.

Su Rui said, "Don't worry about electricity, this LED light can last for 72 hours in this brightness state." The situation is complicated, we don't need to consider the problem of energy conservation for the time being, or we have to see the surrounding situation clearly......"

Su Rui's voice was a little vigilant, it seemed that the psychological shadow left by the smoke soul was still there.

Lao Wang next door said obediently again, "I've never seen such a bright headlight last so long, what battery?" It is more powerful than those black technology mobile phones that charge for 5 minutes, talk for 10 hours, and have a long standby for 7 days! ”

Zi Yang accosted on the side, "Military-grade, right?" The things used by the army are generally more powerful than the civilian level, our ordinary mobile phone battery, standby for three days is already good, and the military-grade functions are more, and it is okay to play for a week or two. You can make a call when the battery runs out! ”

The last braggadocio amused Su Rui as well.

"You're right, military-grade things are indeed much more advanced than civilian ones, but our equipment is even more advanced, most of them are scientific research grade, and they are specially made in the laboratory, because of the high cost and high manufacturing difficulty, the army has not yet popularized it."

Lao Wang shouted again, "Good girl, how expensive this is, even the poor and extravagant US military can't afford it!" Saying that, he fumbled with the LED headlights and couldn't put it down: "Hey, it's not hot at all, Lao Li, you can touch it too!" ”

Su Rui said: "Let's put it this way, most of the instruments we brought are more than enough to pay for all the expenses of this scientific expedition." ”

Lao Wang opened his mouth wide and couldn't close it, a group of people in the Mediterranean Sea made chickens and dogs jump for some money, and a random instrument can withstand the cost of the entire tour group. This grade is really 108,000 miles behind.

Thinking that they threw a lot of equipment in order to block the monitor lizard, I suddenly regretted it, how much money was thrown away inadvertently!

Ziyang asked, "You ...... What is Alexander's origin? It seems that this equipment is beyond the scope of normal scientific research teams, and even the US special forces may not be able to afford it. Ziyang finally understood why Alexander was desperate to protect these instruments and equipment.

But he had deeper doubts in his heart, these people came to Lop Nur with such expensive equipment, obviously they already had a lot of information here, otherwise they would not have specially prepared this kind of cave exploration equipment in the desert. The question is how much do they really know about the situation here?

With Su Rui's instruments as the foundation, everyone felt a lot more at ease, counted the supplies, and there was no shortage of food, mainly fresh water, which could only last for about three days.

At the moment of division of labor, Su Rui used sonar to probe the map in front, and Ziyang and Lao Wang carried Alexander on a stretcher. Xiao Hei carried a headlamp to illuminate the road in the back, and each of the four people carried a large mountaineering bag, which contained all the instruments and supplies of the expedition team.

In the end, Timur walked, and he also carried a lot of things on his back, oh, Timur was still carrying a camel leg.

While a few people were chatting, Timur took a sharp scimitar and unloaded a camel leg beside him, although the technique was not as neat and domineering as Ah Chong, but it was also skillful and surprising.

When he did this, everyone watched silently, and everyone knew that Timur had his own philosophy of survival in the desert, and maybe when he ran out of ammunition and food, he would have to rely on his rich experience in desert survival...... Although this cunning fellow may not be able to help them in the same boat.

Under the leadership of Su Rui, everyone slowly moved forward, every dozens of meters Su Rui used a sonar detector to draw, the passage went down with a gentle slope, the more people walked, the more frightened everyone became, this passage seemed to have no end. After walking a few hundred meters, there is already a vertical distance of several tens of meters from the ground.

From time to time, there were other branches beside the passage, the big ones could accommodate people in and out, and the small ones were as thick as Lao Wang's head.

Su Rui will use sonar to detect each hole, and a huge 3D hole like a root system has been mapped on his laptop****** except for the passage they are walking, the other forks are gradually tapering, although there are some places where the terminal cannot be detected, but it can be seen that the diameter of the coil has shrunk, and finally it is impossible for adults to pass through.

After advancing for about a few tens of meters, Su Rui, who was walking in front, suddenly stopped, his face full of doubts, as if he had encountered something unexplainable......