To Yang Jing's surprise, after opening this heavy watertight door, behind the door was a circular passage with a diameter of about two meters, and the passage was made of special steel, which was four or five meters long, and on the opposite side of the passage, there was also a circular watertight door.As soon as he saw this structure, Yang Jing immediately realized what this circular passage and the watertight doors at both ends of the passage were for.Half of the base is below sea level, and it was a natural cave formed by a volcanic eruption before the base was built.Because there is no other place in the cave to communicate with the outside world, enough air pressure is created in the upper part of the cave so that the sea water does not rush up from below the cave.It's just that this cave should have been accidentally discovered by Onishi Takijiro's subordinates, and because it was extremely hidden, Onishi Takijiro decided to transform this natural cave into a secret underwater base.But you can't just walk underwater to get in and out of the base, right?
After all, the steel gate was for the submarine to enter and exit, and the water was too deep for the soldiers on duty at the base to enter and exit through the underwater gate.Therefore, these soldiers on duty in the base must enter and exit the base from other places.And this import and export must be on the island, not in the water.However, once the hole is opened in this originally sealed cave, the air in the cave will inevitably be expelled by the seawater, and then the sea water in the cave will be the same as the sea level outside, and the base will be useless.This is the most basic physical principle, even if Onishi Takijiro does not understand, but the engineer in charge of building this base must understand it.So in order to prevent this from happening, the engineers set up a passage similar to an airtight chamber here.When someone enters or exits, one door is opened, the person enters the passage, and then the first door is closed, and the second door is opened.In this way, the air from the hole does not leak out.These two watertight doors and this circular passage play such a transitional role.And although he didn't carefully inspect the base just now, and he didn't see the relevant oxygen production equipment, Yang Jing was sure that there was definitely an oxygen concentrator in the base, after all, the oxygen concentrator had been studied by the Germans as early as the beginning of the last century.Although only Germans and French people in the world could make industrial-grade oxygen concentrators before the thirties, with the outbreak of World War II, he also learned the production process of oxygen concentrators from the Germans early on.And this base was established in the forties, so there is absolutely no shortage of oxygen concentrators in the base.Because the oxygen generator can not only produce a steady stream of oxygen for the base, but also continuously replenish the air pressure consumed by the base due to the entry and exit of personnel.After figuring out the function of this passage and the two watertight doors, Yang Jing closed the first door, then walked to the other door and opened the second door.Outside the gate are still natural caves, but there are several barracks, which are supposed to be the Japanese barracks guarding the base.After walking forward about 40 meters along the road between the barracks, a ladder that sloped up appeared in sight, and when I looked up, this inclined ladder extended upwards for more than 30 meters, with a height of about 15 meters, and at the top of the inclined ladder, there was still a round watertight door.Obviously, the staircase and the watertight door at the end of the staircase are the entrances and exits to the outside world.Yang Jing looked back at the base that came over, and drew the structure of this base in his heart.The base was built on the basis of a natural cave, the widest point was at the southernmost part of the cave, that is, on the slipway, the width of the east and west was more than 100 meters, and the height of the cave there was also the largest, at least forty or fifty meters high.The base then extends all the way north, narrower in width the further north it goes, and the cave is constantly decreasing in height.Until more than 200 meters away, the base became more than 40 meters wide and 15 meters high.Overall, the base resembles a trapezoidal cube.Yang Jing shook his arm, then grabbed the ladder and began to climb up, and after coming to the watertight door at the end of the ladder, Yang Jing tried to twist the knob on the watertight door.With a souring sound, the watertight door finally began to move.When Yang Jing twisted the knob to the end, the watertight door was completely opened, but this watertight door was very heavy, even with Yang Jing's strength, it took a lot of strength to finally open the watertight door.The moment the door opened, the sunlight accompanied by a burst of hot air suddenly poured in from the outside, and after Yang Jing climbed out, he took a look, only to find that he was at this time in the position of the gentle slope on the west side of Maugesi Island near the foot of the mountain.When I got out, I found that there was a lot of dirt and a few rocks scattered around the door.No wonder this door is so heavy, it turns out that the top of this door has long been covered with at least half a meter of earth, and a few rocks that have rolled down from the mountain have also pressed on it.If it were a different person, I am afraid that I would not be able to open this door underneath at all.No wonder Chris, they didn't find the entrance to the base on this island before.How could Chris be able to find the door when it was buried under the dirt, they didn't have a special instrument to detect metal, and it was almost negligible in relation to the entire West Island?
Yang Jing stood next to this door, took off his mask and took a deep breath before starting to call Chris and them over the radio.After a while, Chris and the others came out of the lagoon in a motorboat, and saw Yang Jing standing at the foot of the mountain with a strange face.After getting off the motorboat, several bodyguards trotted in front of Yang Jing, and Chris asked strangely: "Boss, we didn't see you coming out of the water, why are you standing here?"
”Kevin Martin on the side said with a confused expression: "Boss, could it be that you would use the kind of shapeshifting in Harry Potter?"
”Yang Jing pointed to the big hole beside him with a smile, and only then did several people see the open round watertight door."
Boss, is this the entrance to the base?"
Thomas patted his head and asked in disbelief, "I went up the mountain from here yesterday, why didn't I see this door?"
”Yang Jing didn't bother to explain, just said, "This door leads to the base below."
There are two entrances and exits to the base below, one in the water and one here.By the way, did George and Clark come up?
”"Not yet, but it's coming soon, Sean and Mark are staring over there."
Yang Jing nodded and said, "Take a rest first, and when George and the others come up, we'll go down from here!"
”ps: Bow and thank you for the 1000 tip of "There is a dream that can't be realized", and the tip of 100 for "Book Friends 20180204015426895".