After the barrier security door was lowered, An Ruoxuan immediately ordered the front to retreat. The fall of the security door of the pen ~ fun ~ pavilion www.biquge.info barrier is not something that the star insects can stop, even if some of the star insects may protrude from the Tower of Babel because of the retreat of the defense line, but the number is definitely not too much, and it is easy to clear it.

The speed at which the barrier security door was lowered was definitely not slow, but it was enough for an unusually agile star worm like the Blade Mantis Beast to protrude through the passage. Within a few minutes of An Ruoxuan's order to retreat, dozens of sword mantis beasts had already burst out of the passage, and there were quite a few poisonous explosion insects mixed in with them.

Dozens of sword mantis beasts breaking through the defense was definitely not a big problem, and they were quickly slashed and killed directly by An Ruoxuan and them. At the same time, the poisonous explosion insects that stood out were killed by long-range fire before they had time to run to the front, and it can be said that so far, the poisonous explosion insects have not had the opportunity to show An Ruoxuan and them their divine might.

When An Ruoxuan and the others completely killed the insects that slipped through the net, the security door of the barrier was completely closed. The barrier door, which could have been closed silently, made a heavy impact when it landed due to the initiation of a violent closing procedure. The sound of the impact was mixed with the sporadic screams of the sword mantis beast and several violent explosions.

When the barrier door was completely closed, a few unlucky star worms happened to be crushed underneath. The sturdy exoskeleton of the Blade Mantis didn't stop the fall of the barrier door, and with a scream, it exploded, bursting into a green pulp.

The poisonous explosion insects that the intelligence said would not be easily detonated by the attack also exploded violently under the weight of the security door of the barrier, and even a scream could not be released, and it exploded into a cloud of purple smoke on the spot. The scene of the poisonous explosion insect self-explosion was so unexpectedly displayed in front of An Ruoxuan and them, and when they saw the result of the explosion, they were all shocked into a cold sweat.

It can be said that the explosion itself caused by the self-detonation of the poisonous explosion insect did not have much effect, and the self-detonation beetle with the same power as the poisonous explosion insect could not leave a trace on the wall of the base when it completely self-detonated, and the poisonous explosion insect was naturally the same. What is really terrifying about the Poison Explosion Insect is the purple poisonous mist that it produces after it explodes, which can cause great damage to the surrounding things.

As mentioned earlier, the material of the barrier security door is exactly the same as the main material of the Tower of Babel, and the main component is a special inert nanocomposite metal material. The chemical and physical properties of this nanomaterial are very stable, and basically do not react with any known acids and bases.

Most powerfully, this nanomaterial has an extremely high melting point. The unique internal structure can ensure that it can withstand extremely high temperatures of 20,000 degrees Celsius and will not deform in a short time. You know, the temperature on the surface of the sun is just over 6,000 degrees Celsius.

At the beginning of the development of this material, it was to deal with the plasma bombardment of the giant cannon beetle, and the plasma sprayed by the giant cannon beetle can reach a maximum temperature of 10,000 degrees Celsius, and it is difficult for there to be a substance on earth that can block the continuous attack of this plasma.

However, with such a high-end material, under the poisonous fog of poisonous explosions, there were obvious traces of corrosion on the barrier, safety door and ground. Although it only formed a slight corrosion on the surface, it did break the myth that the material King Kong is not bad.

After seeing this scene, An Ruoxuan and the others were all in a cold sweat. Although the light mechs they wore could provide some protection against explosions, they were absolutely unable to block the attacks of that poisonous mist. To be sure, if a poisonous blaster explodes around them, if you're lucky, the mecha will be destroyed, and if you're unlucky, someone might get in.

The advantage of a light mecha is that it is lightweight, easy to deploy, and easy to conduct indoor combat. But at the same time, at the cost of lightness, the defense of light mechs is also greatly reduced. The light mecha uses some composite materials with light weight and high strength as armor, and An Ruoxuan's group of light mecha has weakened the armor again because of the reduction of power.

Once a light mecha like this is hit by a poisonous explosive bug, it is basically impossible to escape the result of the destruction of the plane and the death of people. An Ruoxuan could indeed only sigh at the power of the Supreme Consciousness Steering Group, and think about it, on the earth, who can surpass its power. Even Mr. Luo can't be, right?

After seeing that the security door of the barrier was completely closed, An Ruoxuan and the others breathed a sigh of relief for the time being. She immediately led the remaining 20 or so team members into four groups and went straight to the lifting platform. An Ruoxuan, Chen Yi and Hai Yi each arrived at a lift platform, and carrying one more mecha is not an overload for the lift platform, but it will be slower.

After the other six mechs stood still, An Ruoxuan pulled down the lever of the lifting platform. After a slight shock, the entire lifting platform began to rise slowly. An Ruoxuan's platform was facing the closed barrier security door, and she had always been curious about the so-called backhand left by Luo Tian, why hadn't it appeared until now?

Due to the fact that the lifting platform often has to transport some precision goods, the overall lifting operation is still very stable. In less than ten minutes, with a tremor of the lifting platform, the platform docked very smoothly on the -19th floor.

The area and layout of the -19 floors are basically the same as those of the -20 floors, but the height is different. The height of the -20th floor is 20 meters, and the height of the -19th floor is only 10 meters, which is half the height of the -20th floor. - Floor 20 is taller than all the other floors due to the location of the Stargate and the numerous intricacies installed on it.

Upon reaching the 19th floor, the vicinity of the lifting platform was crowded with people. The people who had previously taken the lifting platform to the -19th floor were anxiously waiting for An Ruoxuan's information, and after seeing An Ruoxuan and many of them arrive at the -19th floor, all of them breathed a sigh of relief.

If An Ruoxuan and the others failed to successfully withdraw to the -19th floor within the scheduled time, the people who had withdrawn earlier had already decided to go to the -20th floor again to support them. Those who first retreated to the -19th floor had already completed the refueling of the mecha on the -19th floor, and the liquid metal fuel of this light mech was canned, and the refueling only needed to be refilled with fuel canisters, which was very convenient.

On each floor of the underground base, there is an ample stock of liquid metal fuel tanks. These fuel canisters were sent to the underground base along with the light mechs, all in response to the unpredictable energy extraction of the stargate. The previous preparation finally came in handy today.

After the last group of people led by An Ruoxuan finished replacing the fuel tanks, An Ruoxuan began to give the task of defense. The covers of the four lifting platforms are completely locked, cutting off access to Floor -20, as well as Starworms from using it to enter Floor -19.

This time, the focus of defense is still in the Tower of Babel, and the few passenger elevators and ordinary stairs in the Tower of Babel may be the gateway for the Star Worm to break through.