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The explosions of grenades, small bombs and concussion bombs would reverberate inside the fortress every once in a while.
And every sound means that a vent, exhaust hole, or even a reserved equipment assembly hole that can exchange air with the outside world has been blown up.
? Originally, the air inside the fortress was slightly polluted because the main ventilation system was damaged.
But as the amount of air exchange between the inside and outside becomes lower and lower, although the internal space is not yet hypoxic, more and more people are experiencing chest tightness under tremendous pressure.
The base commander had no choice but to find a way to open several old ventilation holes that had been sealed.
During World War II, due to limited technology and limited fuel for power generation, the fortress had to rely on a large number of open or dark vents to exchange air.
"These vents now not only affect the three defense systems of the entire fortress, but also increase the instability of the overall structure.
So most of them were blocked by injection as soon as the reconstruction project started.
And the repair team was very responsible. They not only calculated the shrinkage and expansion ratio of the mountain and blocking materials, but also used advanced pouring technology to perform bubble-free pouring.
It can be said that a lot of effort has been put into ensuring the structural stability in the future.
But now, these thoughts have become a huge obstacle.
??It can be imagined that opening those vents that have been filled is more difficult than opening a new one.
Just when the base commander was racking his brains to appease everyone, something even more troublesome for him happened.
Although the main air exchange system was damaged before, the airway was still clear. Under the influence of natural wind, there is still a large amount of air flowing in from time to time.
The airflow flowing into the fortress generally flows from north to south.
That is to say, the airflow enters the fortress from the main air channel and the air holes on the north side, flows through the structure in the fortress, and then flows out from the south side and the gate.
The reason why the civet cat left the main ventilation channel unsealed was to leave an escape route for Gao Mei and the other three people who entered.
Now the safety of the top and second floors has been confirmed, and the improvement of the internal structure of the fortress is basically understood.
After Gao Mei and Hua Hu have the offensive initiative and room for tactical maneuvering, their main air channels will naturally no longer be left to the enemy.
A large piece of iron sheet removed from the equipment box, plus a few barrels of foam glue, sealed the large hole with a diameter of one meter tightly.
The civet cat outside also followed the instructions given to him by Gao Mei and focused his efforts on the north side of the mountain. Seven or eight holes, large and small, were destroyed by him one after another.
In this way, the air flow in the fortress almost stops, and the outside air flow blows through the mountain under the action of air pressure, and is directly pressed into the interior of the fortress from the holes in the south.
And what is the largest hole in the south?
The main entrance!
What¡¯s outside the main entrance?
Three heavy trucks are burning fiercely!
The white, black, and even some blue smoke released from the combustion of various combustible materials such as diesel, wood, rubber, plastic, etc. are constantly sent into the interior of the fortress by the airflow.
Not to mention the toxicity, people who are choked by the smell simply cannot breathe.
The base commander had no choice but to order the two teams guarding the main gate to close the gate and activate the air filtration system that had not yet been assembled in the base.
With five or six large pumps starting to work one after another, the smoke inside the fortress, especially on the first floor, has been greatly relieved, but the smell in the breath is still very pungent.
¡°Coupled with the fact that the main entrance cannot exchange airflow, and there are a large number of soldiers and workers on the first floor, the oxygen content in the air begins to inevitably decrease sharply.
And all the base commander can do right now is to urge the workers in the northeast who are desperately digging, faster, faster!
¡ª¡ª¡ª¡ª
"Here!" Huahu measured it three times with his feet and came to a conclusion firmly.
"You make arrangements, I'll contact the civet cat." Gao Mei confessed and returned to the previous floor.
After previous testing, there was a thin spot on the second floor. Although the signal strength is not strong enough to support direct calls, text messages can be sent.
While Gao Mei left quickly, Hua Hu used the folding pick he carried with him to carefully carve out slots in the corners of the passage to place small-power directional blasting bombs.
In order to maximize the load-bearing capacity, the structure in the fortress does not correspond up to down like a building.
But like the branches of a tree, layer by layerbsp; And Huahu¡¯s work is not yet finished here. The diameter of the ventilation pipe is only fifty-five centimeters, and even Cai Aalun¡¯s skinny figure can¡¯t squeeze through it.
Therefore, he still needs to open up the right side of the ventilation pipe and open up the ventilation pipe and wiring harness pipe.
Then expand it up and down to dig out a passage that is barely enough for an adult to drill through.
¡ª¡ª¡ª¡ª
Serati fell into extreme uneasiness.
He made five or six phone calls and repeatedly stated the necessity before finally getting the authorization to enter the fortress.
But when he dialed the fortress¡¯s external contact phone number and prepared to confirm the authorization and file the visit, the call could not be connected no matter what.
Not only did the external contact phone calls fail, but there was also no response to online communications and emails.
Realizing that something serious might have happened, Serati immediately summoned the eleven men who were out to investigate the whereabouts of Huo Ansheng, and rushed to the fortress in three vehicles.
Twenty minutes later, three cars rushed out of the city, ignoring all traffic rules. Then he picked up speed again and drove quickly along the empty forest tourist road.
??????????????????????????????????????????????? The closer we get to the fortress, the stronger the uneasiness in Serady's heart becomes.
Although the sun has not risen yet, the sky is already bright. The green light envelops the mist in the surrounding gray mountain forests, revealing an infiltrating silence.
Serati stared at the lifeless scene outside the window with stiff eyes, and suddenly said to the co-pilot¡¯s men: ¡°Call the general administration and tell them there¡¯s something wrong with the base.
¡°(Call the General Administration and tell them something happened at the base.)¡±
The man took out the phone, but hesitated to dial the number.
After taking some courage, he bit the bullet and said, "it may be that the construction caused the line damage. (It may be that the construction caused the line damage.)"
What my subordinates said is not unreasonable. When rushing to work, accidents such as accidentally digging communication lines or affecting power supply are actually very easy to happen.
"Do itnow! (Call, immediately!)"
Serati¡¯s blood-red eyes and sudden roar made his hand tremble in fright, and he quickly pressed the dial button.
After waiting for a few seconds, there was no waiting sound. I looked at the phone screen strangely and found that there was no signal on this mountain road.
So while showing the phone screen to Serrati, he said helplessly: "No signal" (Remember this website address: www.hlnovel.com - Didn't finish reading? Add this book to your favoritesI'm a member and bookmarked this chapterCopy the address of this book and recommend it to your friends for pointsChapter error? Click here to report
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