There was a string of lights in the tunnel, but Cassia did not turn it on. The nearly three-meter-wide tunnel was flexible enough for Cassia to cope with it in the dark. The sense of direction became Cassia's most sensitive perception at the moment, and she kept her steps in the middle of the tunnel.
Every time he deviates from a certain direction, Cassia will completely record it in his head so that when the detection is completed, he can draw a route map that is not too different from the actual one.
It is connected to the air circulation system, and the sound wave pulses have detected some air delivery pipes. They are not open at the moment, and the tunnel seems a bit dull. If biological poisons are used here,... While running, Cassia suddenly thought, mix them into the air,
It can definitely achieve great results when the enemy is unprepared.
I don’t doubt that others didn’t think of this when the air circulation system was built. I didn’t say it clearly. Maybe I’m still wary of my protectors. The transportation team can have information leaked, and it’s still within the organization.
The top management is driven by interests and in today's era, it seems that anything can happen.
The tunnel generally presents a straight line, but the angle of the curve is very large. If the sensitivity of perception is slightly lower, the change may not be felt. And in the middle of the tunnel, Cassia also found a fork in the road. The other route is of course a dead end.
, there are many sensing devices inside, and the sound wave pulses discovered their outlines. When they reached the cavity at the bottom of the route, the moving tool like a minecart was more or less prescribed a moving route by the analysis machine.
I don’t know if these forked roads are used to prevent enemies, or to test warehouse management and protectors like myself. From the words of Adolf and No. 5 who have left, it is easy to guess that such a mission is probably used.
A process that adds reasons and certainty for promotion to some elites. Just like when you have the opportunity, even if you just help pass a cup or other tools, you can still put your name on the end of some important research results.
In less than four minutes, an underground semicircular cavity with an area of nearly a hundred square meters completely revealed its shape and appeared in Cassia's perception. After a few breaths, Cassia, standing at the entrance of the cave, determined that there were no unnecessary detections around it.
After installing the equipment, it enters the cavity.
The size of a three-story building, the track in the tunnel suddenly cuts off when it reaches the center of the cavity. There is nothing around it except air. On the side, just like what No. 5 said, several fixed beams of an elevator are made of
The cavity here is penetrated from top to bottom, and two alloy safety doors cut them off, leaving only a section containing the cavity.
Cassia walked to the safety doors and looked up and down. Then high-frequency sound waves were emitted, penetrating these safety doors and detecting the top and end of the elevator.
"It reaches nearly a hundred meters upward to the ground, and nearly two hundred meters downward, with three safety doors in between before reaching the bottom." Along the shaft of the elevator, the high-frequency sound beams slowly and consciously focused in one direction.
"There is an unloading platform at the bottom of the shaft, as well as a simple push trolley. It is also a cavity structure. A door connects this cavity, and behind the door is,,,"
Cassia closed her eyes, and her highly concentrated mind seemed to suddenly leave her body at this moment, appearing directly under the shaft and standing in front of the alloy door with teeth closed. The sound wave frequency suddenly increased by two or three levels at this moment, entering the third level.
In the third stage, he completely self-analyzed the changing structure of the throat and where the upper limit of high-frequency sound waves is. Cassia has not yet conducted a systematic test until now.
As the sound wave beam moved, the alloy door was like a layer of transparent air, gradually fading in Cassia's head. A wide underground building immediately appeared in Cassia's "eyes". It was only a small part, roughly distributed in a fishbone shape.
Most of the many rooms are equipped with equipment and machines for applications. From the weak vibration feedback on them, it can be known that most of the observed machines are operating.
Just not seeing the researchers in the laboratory base for a while, Cassia tried to increase the frequency again, but right in front of her eyes, several glass test tubes placed on the stands suddenly cracked. Her head felt like a heavy blow,
Cassia immediately stopped detecting and returned to the cavity as if he woke up from sleepwalking.
Without any words, Cassia subconsciously lowered her heartbeat and breathing, turned around and escaped into the tunnel along the original route. For three and a half minutes, Cassia, whose expression did not change at all, returned to the basement warehouse again. There was no one around, and upstairs,
The other three people were all doing their own things in their own rooms and had no idea what was happening here at this moment.
Nothing happened, and with this mood, Cassia slowly returned to her room and sat on the bed. After a while, about half an hour, there was no contact sound coming from the communicator in her ears, and Cassia finally
He let out a heavy breath: "We have to find opportunities and time to study the changes and applications of high-frequency sound waves in the third stage."
,,,,,,
"Did you get the records?"
"The assistant went to print and will be here soon." Shortly after the reply came, there was a knock on the door. After saying "come in", the door was opened. A thin man wearing glasses stood at the door, holding three things in his arms.
A thick piece of paper came in and placed it on the table in front of the three of them in the room.
"Here are all the surveillance records, all converted into pictures, recorded every five seconds. I selected the time period within five minutes." There was no fluctuation in the tone of the words of the thin man, like a simple and
The cheap repeater repeated a boring tune, "I discovered this in the past tense, but Professor Mosier."
As the skinny man spoke, he pulled out two pieces of printing paper from the bottom of the stack of papers. The warmth had not yet been lost, the ink seemed not to have dried, and the smell spread throughout the room in an instant.
"Several rooms there are shock chambers, and an ultrasonic record of varying frequencies suddenly appeared on the monitor in each room. The record in the room where the test tubes were broken was the highest."
But Professor Mosier said "Oh", took the record sheet from the skinny man's hand, and asked: "In terms of time, the two should completely overlap, right?"
The thin man nodded, "It totally coincides. The machine we are using has been checked and there is no fault. I have also read the records in the analysis machine. Since yesterday, there are no records of calling and opening. It is very certain that the test tube is broken.
The reason is that a sudden high-frequency sound wave shattered it, but the source of this sound wave was,,,"
"I understand." Professor Mosier nodded, "Let's go to that room and have a look."