Their next destination is an underground mine plant about ten kilometers away from Kaluga District 2. This mine plant is not a mining company, but a mechanical repair factory. It was responsible for the inlet and out of the entire tunnel and the maintenance work. /huotxt/The construction workers of the mine car and track live here. Of course, there are also pressure relief rooms, distribution rooms and living areas in the mine plant area.

The mine area is only 400 meters straight from Kaluga Zone 2, and its altitude is exactly 400 meters lower than Kaluga Zone 2. If it is ground, 400 meters is just a few steps, but underground, the distance of 400 meters makes the tunnel hover and extend for ten kilometers.

It is strange that after everyone walked out of Kaluga Zone 2, the tunnel went down, and there was no continued temperature rise, which did not conform to the geographical and geomorphological characteristics here. According to estimates, they have exceeded the thickness of the earth's crust and are now moving towards the depth of the mantle. The temperature should rise as they go deeper. According to Meng Qingwu's estimate, after arriving at the mine site, the temperature should reach 35 degrees Celsius.

But at this moment, the temperature did not rise but fell. Adelev looked at the temperature meter and now the temperature returned to above zero twenty degrees.

In other words, they are still likely to be attacked by the group of overlord pangolins, but they are not close to them after they come out of Kaluga Zone 2, but there is no sound in the tunnel. It seems that the group of monsters are bounded by Kaluga Zone 2, and they are beyond the limit and they are inaccessible.

"Stop!" At the front, Antelev shouted and ordered.

Then he trotted back and asked Wushuang: "Friend, it has been half an hour since we walked out of Kaluga District 2. According to time estimates, we should have arrived at the mine factory area at this moment, but there is still no shadow of any building in front."

"Meng Gong, compare the drawings and see where we are now." Wushuang asked Meng Qingwu.

Meng Qingwu expanded the drawings and pointed his finger at the tunnel ahead and said, "Look, the mining plant is only so long from Kaluga District 2, and we have been walking for so long now, and we should have arrived long ago. This is not normal unless the little Japanese later changed the layout of the living area in Tianyan.

"Can we find where we are on the drawings now?" Wushuang asked him.

The Sky Eye Tunnel is not an ordinary road tunnel. It is only a hundred meters away. Once it is opened, it will be opened. You can see the other side from here at a glance. The tunnel is endlessly deep, and I don’t know how many difficulties encountered in the excavation project. It is almost equivalent to a military organization, so the original design was also very rigorous. The altitude distance was marked with Arabic numerals on the left and right sides of the cave wall, and then compared with the altitude value on the drawings.

"Shuangye, look, we have arrived at this position now." Meng Qingwu pointed to the Arabic numeral 628 on the cave wall behind him and said, which means they are now at a minus 628 meters above sea level.

"According to the drawings, we are still a normal distance from the mine site."

"This is impossible! Our speed is not slow, can't we walk ten kilometers in half an hour? Isn't this a joke?" Antelev shouted.

"Adelev, you don't need to shout, it's useless. This is the fact. The underground is different from the ground and the ground, and the strength of gravity is also different. In addition, the impact of brain pressure drop, our human perception system may be inaccurate. We cannot analyze according to normal thinking. Keep going. Remember the number 628!" Wushuang had no better idea. This is a tunnel without any forks. Either continue to move forward or back down, and there is no choice.

Everyone was full of confidence at the beginning to the depressed mood now, and they all bowed their heads and buried their heads in the walkway. This sky-eye tunnel seemed to be infinitely extended, and there was no end. No matter where they went, the scene was exactly the same on the left and right without any change. Only occasionally seeing the Arabic numerals on the cave wall still reminded them that they were moving forward.

629…630…650…The altitude numbers marked on each hole wall change so slowly, and are getting slower.

Everyone bowed their heads and said nothing, and the end was exhausted, but the ones ahead were all soldiers. They had a firm will. Without Antelev's order, they had to keep moving forward and not stop even if they had worn away their feet without Antelev's order.

"How long have we been gone?" Wushuang asked.

"My master, we have been walking for about two hours after we left 628, but now... we have only reached the negative altitude of 684. This is not scientific? Even if we walk slowly, why can we get out of this distance in two hours?" said Ma Erma.

"Antelev!" Wushuang shouted. "Let everyone stop. If you walk like this, you will never be able to get out of it. Let your surveyor see how far we are from the ground now, and you cannot fully believe the numbers left by Japan."

The surveyor carries the theodolite on his back, and that thing will never be wrong. He told everyone that the underground location we are at is about minus 684 meters above the ground, and the deviation will not exceed two centimeters.

Wushuang shook his head and fell into thought. He could not explain what this phenomenon was going on. He asked Antelev if the cable on the correspondent was still connected to the ground? Call Grasim immediately and ask the ground to use the electromagnetic transmission speed of the cable on the ground to estimate our current location.

The communication engineer put down the cable while walking, and the cable went straight to the ground. The phone was connecting, and a beepy busy tone sounded on the phone, but this busy tone was very strange. Generally, the busy tone would not be short for at most one second, but the busy tone is particularly long now, and a busy tone can last for a minute. Moreover, the sound on the phone was also very unstable. The busy tone was not monosyllable, it was still vibrating.

Antelev held the microphone and looked back in surprise. Wushuang was at a loss. Wushuang grabbed the microphone and listened, and felt very strange.

"It's useless, let it go. Even if it can be connected, the quality of the call will probably not be high, as if it is affected by an electromagnetic field." Wushuang said.

The communication engineer checked all possible faults, but after waiting for more than ten minutes, the same was true for answering the phone again. Even if the ground has been connected, Grasim's voice on the ground is very long, and a syllable has to be spoken for more than ten seconds, and it is impossible to distinguish it.
Chapter completed!