The iron door was slowly opened, and Braider and Brazier outside the door slowly retreated, their task had been completed, as long as they returned to recharge, and then 6 mechanical hounds appeared outside the door, which was a bionic robot of the L24-Q71 model.

Their original form is a hunting dog, the whole body frosted metal reflects a black bright luster, through the body can vaguely look at various lines, a pair of blood-red electronic eyes on the pitch-black head are moving in all directions, the wide back is a repeater, the ban on guns in country Z is strict, civilians want guns is simply whimsical, so these mechanical hounds are only equipped with 20 crossbow arrows, under the beating mechanical parts are black and bright limbs, and each claw is chrome metal!

Chrome is the hardest metal known to occur naturally, with a hardness of 9 on the Mohs scale, second only to diamond!

Weapons made of chrome metal basically have no one who can carry it, although it is said, but its flexibility and ductility are not strong at all, and diamonds, in fact, a hammer can be broken, but nothing can scratch a mark on it, so glass cutters are generally cut with synthetic diamond, as easy as a knife to cut tofu!

Although the knife made of pure chrome metal and Wei Shuo's watchman blade have a hardness of 9 on the Mohs scale, they are actually very different, and if the two knives slash each other, it is definitely a knife break of pure chrome gold!

Why is this so? Aren't they all 9 hardness?

In fact, the ductility and flexibility are compared with glass and plastic, in fact, the hardness of glass is higher than that of iron, that is, it is too brittle, so the hammer will break when it hits the ordinary glass table, unlike plastic, although the texture is not hard, but the ductility and flexibility make the plastic table more stable.

A plastic table will not be pierced by a dagger, but it will make a mark, while glass will not leave a single knife mark!

In fact, the same is true for diamonds, don't look at it so hard, in fact, it can sometimes be broken when it falls to the ground.

……

These mechanical hounds had just been turned on, and after walking around at will, the chrome metal of their paws flowed out of scratches on the steel plate, and the remote sensor in Herbert David's hand showed that the mechanical hounds were online, he was ecstatic, looked up and glared at Zhang Xu and the others, the corners of his mouth were tilted, and they were ready to obey their masters.

In fact, any robot has three principles of robots, which are used to protect human beings themselves, the first one cannot harm human beings, if it is violated, it will be the chip that will explode itself, resulting in a crash.

And Herbert David doesn't need to worry, these mechanical hounds have been modified, and he spent a lot of money to hire someone to set the original three principles of setting robots, as long as he gives an order, he can attack Zhang Xu and others unscrupulously.

……

"Let's go, I'm going to smash his antique vase."

"That's it, anyway, he's just using this laser net to show his prestige."

"If it's a man, stay and go alone! There is an old saying in your country Z, if you are not a man, admit that you are a woman and leave! Seeing that everyone was leaving, Herbert David suddenly pointed at Zhu Zeyu and the others and scolded, if they left, it would be impossible for the mechanical hound to automatically find the target, and when the time came, it would be necessary to find it manually, after all, it would be time-consuming and laborious!

When Zhu Zeyu heard this, he was not happy, he straightened his chest and crossed his waist and chuckled: "He Yan, Qin Yi, you don't have to worry about us, we will go out and light a few fires to burn him, we will stay and watch this old man, and by the way, bring a few vases and the like to fall in front of him, hehehe." ”

However, Han Yi and Qin Yi didn't go out, because the corridors here were really intricate and they couldn't find the north.

Han Yi patted Zhu Zeyu on the shoulder and praised: "Boy, you're quite capable, I didn't find you so black-bellied." ”

"Boss Han, that's all because this David taught well." Zhu Zeyu smiled, is it necessary to give him a good look if he wants to kill himself?

Zhang Xu's expressionless face showed a smile, this person named Zhu Zeyu is not bad, let's see if he can join the Tianyan team afterwards.

……

"Dididi~" Herbert David hurriedly took out the remote sensor in his pocket, and the 6 red dots on it had already surrounded Zhang Xu and them, and then Herbert David sneered and clicked the attack button!

Everyone saw it, "Hey, you bad old man, are you trying to do some kind of thing?" Zhu Zeyu frowned, he felt uneasy!

The place where Zhang Xu and the others are located is all underground control, here extends in all directions, like a labyrinth, if you want to go out and don't take some time to think about it, you will get lost, these mechanical hounds are like tigers in the night, quietly, after they get close to the enemy, the system will start the hunting mode, and the paws will be replaced with meat pads made of sponges, and the red light of the eyes will also turn dark blue.

Some of the convex parts will be retracted into the mechanical body, and the crossbow arrows on the back will also be retracted into the body, so that they can sprint at the fastest speed, and the speed of the engine in the body will also be reduced one after another, so as to achieve the quietness of the sound, but reduce the power of the mechanical hound.

In an instant, Zhang Xu immediately grabbed the nearest Zhu Zeyu and Chu Aoshuang next to him, pulled them to the left, and fell to the ground.

Zhu Zeyu is nothing, because ordinary people are like chickens who put down with their hands in Zhang Xu, a level 10 evolutionary, the key is Chu Aoshuang, Zhang Xu just dragged it casually, almost didn't pull, but in the end he fell into his arms, Zhang Xu looked at Chu Aoshuang with a red face with an embarrassed face, and the two were close to each other for only a few seconds, and then Chu Aoshuang reacted, pushed Zhang Xu away, and glared at Zhang Xu: "Zhang Xu!" If you don't give Miss Ben an explanation, I'll make you the last eunuch on earth! ”

"Everyone, be careful!" Zhang Xu didn't have time to explain, he directly hugged Chu Aoshuang's thin waist and took a few steps back, dodging a pitch-black claw, although Chu Aoshuang's combat power is not weak, but it is second only to a level 3 evolutionary, for this kind of relatively advanced robot, don't look at the strength that can hit a few tons, even so, the flesh and blood can't be compared with the wisdom crystallization of several generations, and the machinery they study for several generations is not something that can be defeated at will!

Chu Aoshuang turned his head and looked, the machine with a blue light in one eye slowly retreated, and then disappeared in the dark corridor, it turned out that Zhang Xu was doing this to save himself.

……

"This is the L24-Q71 mechanical hound, I've seen it, it's very expensive, I don't know how much, but it's powered by a nuclear magnetic reactor in the heart!"

"The whole body is made of high-temperature tungsten alloy, you must know that the tungsten wire used when Ai Disheng invented the electric lamp, I am afraid that the current will burn out, although it is fused with chromium metal, the melting point of the alloy is reduced by several hundred degrees, but it also takes more than 3,000 degrees to penetrate its alloy armor!"

"And chromium metal is the hardest existence of all metals, after becoming an alloy, although the Mohs hardness of this armor is only 7, it has the ductility of tungsten metal, and the defense is even more terrifying!"

"Not only that, in order to prevent corrosion, its armor alloy is also mixed with a large amount of tantalum metal, tantalum metal is not reacted to hydrochloric acid, concentrated nitric acid and other high-strength corrosive liquids under cold and hot conditions, and experiments have proved that this metal is corroded in concentrated sulfuric acid at 175 °C for 1 year, and the thickness of corrosion is 0.0004 mm." Chu Aoshuang said her cognition, she couldn't retreat in the face of this mechanical guard!

Zhang Xu listened very carefully, evolution and technology can coexist, and human technology cannot be underestimated!

The advantages of high strength, corrosion resistance, heat and cold resistance are equipped with this mechanical hound, which makes Zhang Xu's head big, from Chu Aoshuang's other understanding, after understanding that its claws are actually the hardest chromium metal, Zhang Xu, even if his skin is powerful, can it exceed the Mohs hardness of 9? Otherwise, Zhang Xu's face can really be bulletproof......

The nuclear magnetic reactor on his body is the core power of the Golden Dragon Armor, you must know that this set of small reactors will reach millions, and you don't know how expensive these mechanical hounds are!

"There are actually six of these machines here, scattered around." Zhang Xu said lightly, a moment of horror appeared on Chu Aoshuang's face, and she was immediately relieved, because she saw that Zhang Xu was not panicked at all, and it shouldn't be a problem to have this man here!