The losses under the city wall are piling up more and more, and when the fighters are about to be unable to hold on, there is a roar of engines and the "click" sound of track movement in the stadium square, and I see seven or eight large excavators marked "Yatian Group" slowly coming to the back of the city wall.

At the same time, a large number of people wearing Yatian Group overalls, holding walkie-talkies, immediately jumped on the city wall, observed the number of zombies under the city wall, and began to use the walkie-talkie to direct the excavator.

The mechanical arms of these large excavators are so long that they can easily bend over the four-meter-high city walls, and then attack the zombies outside the walls through the walls.

There are many ways to attack large excavators, in addition to directly attacking by digging, you can also use a certain range of arms to knock away the zombie hordes that have been piled up by stacking Arhats.

There are even some excavators, which are directly replaced with crushing heads, and then these crushing heads stretch out outside the city wall, and under the command of the walkie-talkie, they resist the heads and bodies of the zombies, and they begin to shatter.

The thick crushing head can hit at a high frequency in a short period of time, not to mention the head of an ordinary zombie, even if it is a hard cement floor, it will be shattered under the continuous crushing of the crushing head.

Once the broken head is against the zombie's head, it will be broken immediately, and the head will directly bloom, red and white splash, and the scene will be shocking.

However, many times, the broken head is not specifically to smash the heads of zombies, but constantly by throwing his arms, he cuts open the zombie piles that are piled up and climbs the city wall quickly, or uses his mouth to brutally put the broken head directly against the zombie pile, which is a burst of high-frequency shattering.

Under the impact of the broken head, the blood and flesh in the zombie pile immediately flew sideways, and the zombie pile that was originally piled high immediately collapsed.

With the addition of large excavators, the defense line that was about to collapse began to stabilize again, but this stability only lasted long, as more and more second-order zombies jumped onto the city wall, and even some second-order zombies began to attack the excavator master behind the city wall, the entire defense line immediately became dangerous again.

If you want to start the excavator, it is very simple, but it is a little difficult to operate the excavator well, especially this kind of zombie attack outside the city wall, and it cannot destroy the city wall.

Because once the master driving the excavator is bitten to death by the second-order zombie, then this excavator is almost impossible to operate, because the general novice operation, not only can not be effective, but also will accidentally collapse the city wall, after all, the so-called city wall is not made of reinforced concrete, but only the accumulation of various wastes.

As some excavator masters were bitten to death by second-order zombies, without the assistance of the excavator, the city wall guards immediately looked Alexander, after all, the excavator only needs to dig or flick an arm to cut through the zombie pile under the city wall.

However, it is very difficult to use manpower to get rid of the zombie pile, and it is almost impossible to do it, so you can only wait for the zombies to rush up and kill one, which is very inefficient.

,,,A burst of intensive machine gun fire sounded, and Shi Gaosen ordered his armed police to shoot intensively at the second-order zombies who jumped into the camp and constantly attacked the excavator.

There were a dense number of survivors in the camp, and under the intensive strafing, hundreds of survivors were directly killed by stray bullets, but this second-order zombie was also torn apart under the dense bullet fire net.

I have to say that Shi Gaosen is also a person with means, in other words, the average commander would not dare to order the shooting, but Shi Gaosen didn't care, the goal was clear, that is, to kill this second-order zombie, even if he accidentally injured hundreds of survivors, he would not hesitate to do so.

In the defensive area of the Young Pioneer Group led by Ouyang Qian, if a second-order zombie jumped into the city wall, there was no need for Ouyang Qian and other evolutionaries to make a move, Ye Feng and Zhang Ying would lock it at the first time, and then kill it within a few seconds.

Seeing that with the cooperation of Zhang Ying and Ye Feng, they were so strong, and in their eyes, the second-order zombies who were like the god of death were easily killed like a local chicken and a dog, which shocked Ouyang Qian and the others, and at the same time, they also had a lot of confidence in holding the line of defense.

Compared with ordinary zombies, although the number of second-order zombies is small, the pressure on the defenders is the greatest, as long as a few second-order zombies jump into the camp in a row, it will immediately cause chaos, and eventually lead to the collapse of the defense line.

As the zombies outside the city wall attacked more and more fiercely, the roller blocking the city gate started again and slowly drove outside, and at the same time, when the roller drove out, a heavy truck immediately drove to the city gate and blocked the city gate from the beginning.

After this heavy roller drove out, it immediately turned on its full horsepower, crushing back and forth in the zombie group, and the sound of "poof" was endless, and countless zombies were directly crushed into meat by the roller.

In addition to the sound of "poof", there is also the sound of zombie bones crushing "click", after the roller presses over the zombie body, it can almost completely smash the zombie bones, in the face of this heavy equipment, the flesh and blood of the zombie is obviously unstoppable.

The heavy roller was in the zombie crowd outside the city, and after a few back and forth, hundreds of zombies were turned into flesh, and black-brown blood and scraped meat flowed all over the road outside.

Even because there were too many zombies, this heavy roller had to turn on the shock, otherwise it would be arched to the ground by the dense zombie corpses.

When the heavy-duty roller is tamping the road surface, many people can clearly feel the shaking, not the weight of the roller is terrifying, after all, a heavy-duty roller, the total weight is only about dozens of tons, which is equivalent to a heavy truck full of goods.

However, a heavy-duty roller can make the ground shake, but a heavy-duty truck of the same weight cannot, because the roller can vibrate when the road surface is tamped, so that the ground can be shaken.

After this heavy-duty roller starts shaking in the zombie group, the zombie corpses after crushing are directly separated into very small pieces under the shaking, and they are evenly tamped around, so that a mountain of corpses will not be formed.

Only this kind of heavy-duty roller can wander in the sea of corpses without being overturned by the sea of corpses, and if it is replaced by a heavy truck of the same quality, even an excavator, it will not be able to crush the zombies in the sea of corpses.

Because the corpses of zombies are piled up, forming an uneven road surface, heavy trucks and excavators driving on it, and when they are attacked by zombies, they are likely to roll over.

Heavy-duty rollers will not, firstly, the design of the roller is to tamp the road surface, specifically to compact the uneven road surface, so the stability is excellent.

Second, it has a concussion function, and under high-frequency oscillation, the flesh and blood will be fragmented and directly become meat sludge, which cannot be piled up.

This reinforced and modified heavy-duty roller was constantly crushed in the sea of corpses outside the city, which greatly reduced the pressure on the defense line at once, and many zombies were attracted, gathered around the roller, and were crushed into meat by the roller, and even some unlucky second-order zombies, once they were involved in the huge rollers of the roller, they could only be crushed into meat paste.

Although the physical strength of the second-order zombies far exceeds that of the first-order zombies, there is no difference in front of the road rollers weighing dozens of tons.

The two evolutionaries standing on the top of the roller kept waving the rebar spear in their hands, poking a zombie trying to climb onto the roller, and the Yatian Group obviously cared about this roller very much.

If the roller is attacked by a second-order zombie, and the roller does not succeed in rolling the second-order zombie under the rollers, then the garrison standing on the city wall will concentrate their fire on the second-order zombie to ensure the safety of the roller.

(I finally managed to squeeze out a little time to make two changes today, and when this time is busy, it will resume normal updates.) ）