In fact, the ultrasonic pulse generator, or the infrasonic pulse generator, has long been used in reality, which is the so-called sonic fire extinguishing device, of course, the size of the infrasonic pulse generator needed to extinguish a large area of fire is too big, and the electromagnetic cannon designed by Xiao Chu only needs to empty the air in a narrow range of less than one square centimeter, and the materials and power supply he uses are not comparable to ordinary materials at all, they are all made of rare elements, and the power is naturally needless to say. Under the super voltage supply of the electromagnetic gun's several sets of capacitors, this thing can even be used directly as a laser sword, at least within three meters to cut a concrete or something, of course, this is also another life-saving method for Xiao Chu to dare to drill into the ground, it really doesn't work, his super battery worth 10,000 energy points can use this gun at full power for several months. After adding constant gold and 10,000-year-old cold iron to all the manufacturing materials, it is difficult to use the durability.

It is not enough for an electromagnetic pole to accelerate a bullet or cannonball of a permanent magnet, because it takes a certain distance to accelerate from 0 to a higher speed, and if the distance is too short, the accelerated thing will directly crumble and disintegrate. It's like a projectile hitting a solid object. If a shell hits the glass with a shell of several kilometers per second, it is naturally the problem of the object suddenly accelerating from 0 to several thousand meters.

If you want to overcome your own inertia, you have to work the structure and material of the bullet, the structure of the bullet must be quite strong, and the muzzle velocity must not be too ferocious.

When the bullet accelerates within the tolerance range, in fact, the speed of the bullet is not too fast, it is about twice the speed of sound, but after several rings of electromagnetic-level propulsion acceleration, the bullet of the permanent magnet will obtain a rather terrifying initial velocity, which is the same as the longer the barrel, the more acceleration time, the faster the initial velocity.

But here comes the problem again, magnetic interference, if it is the pole of a permanent magnet, it is bidirectional, so the ring magnetic acceleration needs to be activated when the position of the permanent magnet bullet is at its own repulsive pole. This was an impossible problem to overcome before. But now, thanks to the atomic clock, the time can be accurate to one millionth of a second, and the natural graded acceleration is no longer an insurmountable problem.

However, there is a limit, that is, the speed of the bullet is so fast that a long electromagnet does not provide much acceleration to the bullet, and it becomes uneconomical to extend the trajectory. It's like a little cart sliding past you and you want to give it some strength. The first few people are okay to say, you can basically add a little strength, but in the back, the speed of the small cart is too fast, and when you can exert power on it in ten-thousandths of a second, you can add more power? Almost incalculable.

And the debugging in this is quite terrifying, according to the normal situation, if you want to debug it to the best state, it is impossible to do it without tens of thousands of experiments. But when Xiao Chu made the electromagnetic cannon, it was done at one time, and there was almost no need for any debugging, which can be regarded as a wonder among the wonderful. What's even worse is that the follow-up several improved types, after Xiao Chu designed them according to the feeling, they were all one-time, and there was almost no need to debug. This is something that the guys from the Star Machine can't even figure out.

As for why you asked Xiao Chu why he set it to that distance and that voltage, Xiao Chu didn't quite understand, but he felt that it should be no problem.

A heavy machine gun, thousands of natives, and still won't find a bunker to hide the delivery. Well, the heavy machine gun is replaced with a super shotgun, the killing effect, it's not too ferocious, a shot sprays out, and a fog comes out in some places, that's when the super shotgun hits the zombies, the blood mist splashed, because there has been no blood for decades, this group of devil zombies are almost dry adults, and they are basically shattered in one dozen.

Really hi skin, after twenty shots, there were no more creatures standing in front of Xiao Chu, and even some of the bunkers were shattered.

As for the remnants of some zombies, there is no need to waste precious shotshots at all, and they can be easily solved with a single shot of small ammunition.

Besides, Xiao Chu didn't have a lot of ammunition on his body, only more than 600 rounds, and any more would be too heavy.

In the end, Xiao Chu had to take out the money heavy sword, and smashed the slow-moving zombie remnants with a few swords.

Looking at the messy huge cave, Xiao Chu was buried for a while, and took out a talisman, the golden light exorcism talisman, although it is also a kind of golden light to break the evil talisman, but the effect is different, the effect of this talisman is to disperse, if the golden light breaking evil talisman is a bullet fired by a firearm, then this golden light exorcism talisman is a cannon battle, a self-lit can dispel a range of several hundred meters, no need for more advanced ones.

The special energy swept through all the wreckage, and the zombie remnants and some evil items contaminated with evil energy and yin energy were easily turned into ashes.

"Heavenly Machine, Leave the Dust" said a low mantra, and then another talisman flew out of the talisman bag, which was bought from the system to study.

This talisman is powerful, powerful to the point of being close to the law. The only effect is to absorb the surrounding dust, Xiao Chu once tried one, okay, PM2.5 and less dust can absorb all of it. The range of absorption is related to the amount of vitality input when the talisman is activated.

Xiao Chu Yicheng's vitality can absorb a range of three hundred meters, and all the fine dust and dust in the period will be absorbed together, and even the sand and gravel can't escape, which is basically a super vacuum cleaner. If it weren't for the fact that the cost of releasing this talisman was too great, this thing would simply be a haze buster.

What can more than 600 zombies be compressed into ashes in the end? Throwing away all the moisture and gaps, the ashes that hundreds of people gathered together were only the size of a basketball.

A pile of broken copper and iron, iron is the rusted remains of guns and other things, some can still see the shape, it's not easy, it's not rusty in such a heavy place, and the steel that made these guns is more powerful. You must know that water vapor is not the same as yin, but yin is more corrosive than water vapor. Especially for some metal materials that are easy to rust, such as copper, iron, etc., in places where yin qi is prosperous, they will soon be rotted into a mass of scum.

What about things like gold, silver, and jewelry that don't corrode easily? It's strange that there is no trace at all. Could it be that the owner of this cemetery is greedy for money?

Oops, who hit me in the head?