Chapter 777: Underground space of garbage dump

If it hadn't been for Qi Lin to keep an eye on it, I'm afraid he would not be able to find the Morse code hidden in it, let alone other people.
In the absence of a dedicated audio analyzer, or a skill like Qi Lin that can increase the perception and endurance to the limit by accelerating the energy-gathering vortex, any member of the Thunder Falcon team will receive this buzzing sound. It is absolutely impossible to perceive the hidden information.
Since it is a survival signal, it should be simple and easy to understand. Only in this way can people be clear at a glance-like those who live on an isolated island, if they want to put a distress sign on the beach, it must be bigger and more eye-catching. The better, after placing the distress sign without reason, try to cover it up...
unless……
Unless the caller is in a certain dangerous situation, can't others see this call for help?
Just like the secret agents in those spy war films that go deep behind enemy lines?
This explanation seems to work, but if that is the case, the distress signal should not be sent on the FM broadcast channel at all. This is not an encrypted channel at all. Not only is the transmission distance short, but it is also extremely easy to intercept... …As for cracking, only an audio analyzer is needed.
Input this beep sound into the audio analyzer, it is easy to see a frequency curve with three low points sandwiched between six high points. At this time, even a stupid person can understand it. This is an international distress signal.
...
...
While sneaking, Qi Lin thought about the distress signal, and unknowingly touched the outside of the Leshan Garbage Treatment Plant.
Facilities such as garbage treatment plants are naturally built on the fringes of cities, but when Qi Lin walked into the garbage treatment plant, he found that it was incredibly clean, as if it had been emptied.
Even on the eve of the outbreak of the nuclear war, most people fled the city, and the number of people left will definitely not be small. With a population of one million in a city, the amount of garbage produced on that day is a very large number. It makes no sense that the garbage treatment plant will be empty.
Qi Lin walked around the inside of the garbage factory's fence, and he quickly discovered the anomaly-the underground of the garbage dump seemed to be empty...
There are no shelters underground in Leshan City. Even if there is, the minimum standard for a nuclear shelter must be five meters or more underground, but judging by the echo from the ground, it seems that it is less than one meter below the garbage dump. , There is a huge underground space.
There is no basement in the original garbage dump. After the garbage transported here is sorted, the recyclable part will be sent to other places for processing, and the unrecyclable part will be incinerated or transported to the suburbs to dig pits. Landfill.
It is too close to the urban area, neither incineration nor landfill will be carried out here. What is being done in this garbage dump is only the most preliminary classification work.
Qi Lin quickly found the entrance to the underground. The entrance was located behind the garbage dump. It was a four-meter-square opening with a square metal cover with a pull ring on the surface. There was no shelter or camouflage around the entrance. .
After finding the corpses, the recovery troops quickly withdrew from the ruins of Leshan City. They did not stay in them for a long time. They have never been to this garbage treatment plant. The report about this suddenly emerging underground space is naturally half a word. None mentioned.
There is no lock on the metal cover. Although the weight is heavy, it is not a problem for Qi Lin. He clamped the gun under his arm and lifted it gently with both hands, and a step directly leading to the ground appeared in front of him.
At the same time, a strong strange smell also emerged from it.
This strange smell is very peculiar. It seems that it is mixed with a variety of volatile chemical reagents. Qi Lin can't tell which ingredients are in it. Just to be on the safe side, he took out the gas mask and put it on his head. .
Then he took out a lighter.
This is not to detect whether there is breathing oxygen in the underground space-his gas mask is fully enclosed, and the required oxygen is generated through the reaction of the oxygen generator in the reaction tank, without relying on external oxygen at all. He did this only to test whether there are flammable and explosive gases in the basement.
There are many volatile chemical reagents that are extremely unstable. Among them, there are countless flammable and explosive types. If one or more of these substances are mixed in this gas, as long as Qi Lin dares If he shoots in the basement, or accidentally rubs out a small spark, I am afraid that what awaits him is an extremely violent explosion.
The explosion that occurred in the underground confined space was much more powerful than the open area on the ground. If it were to happen like this, it would be completely cool.
The flame of the lighter was normal, neither extinguished ~EbookFREE.me~ nor exploded. Qi Lin simply threw it under the steps, and nothing happened.
The danger of explosion has been temporarily eliminated.
Opening the safety of the large-caliber assault rifle, Qi Lin held the gun in one hand and the shock bomb in the other, and walked down the steps step by step.
The basement is not too deep, the floor height is about five meters, and the top is about one meter from the ground, but the space is very spacious, almost 1.5 times the area of ​​the garbage treatment plant directly above, which is four to five hundred. Square meters.
The dome, walls, and ground of the basement are all made of concrete, with mesh-shaped wire fences in the middle to form areas of different sizes, and cabinets wrapped in canvas are placed in these areas.
Qi Lin picked up the lighter. When he bent down, he found that there were many two-centimeter-wide wheel tracks on the concrete floor in the basement. He estimated that this should have been left by some kind of transportation tool when moving these cabinets.
Quietly approaching the nearest area, pushing open the door that was not locked, Qi Lin walked to a cabinet.
It was not until recently that he discovered that it was not canvas that was wrapped around these cabinets, but a kind of synthetic fiber with a very special texture. It was thin but very tough. After cutting it for ten seconds with a dagger, he finally cut it out. It took a slap-wide opening, and it took a lot of effort to tear the opening wide enough to expose the entire cabinet.
The cabinet is made of metal, unpainted, without any markings, and of course, it is not locked.
Qi Lin hesitated for a moment, and then opened the metal cabinet directly. As soon as the cabinet was opened, a chill came to his face-he wanted to talk about "Wasteland Survival Rules" with more like-minded people. WeChat pays attention to "Excellent Literature" to read novels, chat about life, and find friends~