For Chen Xin, in order to obtain enough materials, in addition to the extremely inefficient and dangerous way of going out to pick up garbage by himself, obtaining materials through Li Yulong is the easiest and most direct way.

Originally, the SWAT team was also a very suitable partner to work with, but now that the SWAT team is focused on arresting terrorists, it naturally has no extra energy to deal with the exchange of materials with Chen Xin.

Previously, Chen Xin also revealed to the SWAT team that he wanted to exchange more supplies, but the reply he received was that he needed to postpone it temporarily.

This is obviously because the SWAT team has no way to spare enough manpower to deal with this matter, so it can only postpone this matter for the time being, and wait until the terrorists' affairs are dealt with, so that they can have time and energy to deal with the matter of exchanging materials with Chen Xin.

As a result, Li Yulong has become the only channel that Chen Xin can obtain materials now.

However, Chen Xin did not show this, after all, it is not impossible for the group members of other survival groups to exchange materials, but the materials they can exchange are too few, and few people can arrive at his house to exchange materials with him.

After Li Yulong's side received Chen Xin's request, he also acted very quickly, and did not let Chen Xin wait for a long time to prepare the materials he needed and send them to Chen Xin's house.

In addition to the waste tires that Chen Xin asked for this time, there are also car parts that he and Li Yulong said before that they used to transform his car.

"Brother Xiao Chen, I sent you what you wanted!" Li Yulong still came over in person, and while greeting Chen Xin, he said flatteringly: "For the sake of our diligence, can you make me a pair of snow track wheels you said first?" ”

Chen Xin listened to Li Yulong's words, and couldn't help but show a smile on his face, and smiled at him: "Your RV shouldn't need this, right?" And with such a large wheel, the matching snow track wheels are not easy to make. ”

Chen Xin did not deliberately refuse Li Yulong, as he said, Li Yulong's RV itself is a large snow tire, and the chassis itself is high enough, even in today's road snow environment of more than one meter, it can also drive smoothly, and the demand for snow track wheels is not large.

And the large tires naturally need to be matched with large snow track wheels.

Compared with ordinary car tires, which may be the size of ordinary people's knees, the tires equipped with Li Yulong's RV can reach people's chests.

But increasing the size obviously doesn't mean that you can just do it bigger.

"How can this kind of thing be difficult to bring down you, Brother Xiao Chen?" Li Yulong's face was suddenly full of flattery, and while patting Chen Xin's ass, he also said to Chen Xin: "I don't want to experience this thing first!" If it's easy to use, this thing can also be a featured product in our trading market in the future, right? ”

"Do you want to sell snow wheels as a commodity in the trading market?" Chen Xin listened to Li Yulong's words, rubbed his chin, but did not object.

A trading market, in addition to providing a trading platform for other vendors, has its own unique goods that cannot be imitated by others, which is the key to attracting more customers and vendors.

Originally, what Li Yulong prepared for the trading market was a ground source heat pump obtained from Chen Xin, which was naturally enough to attract customers, but who would dislike that there were too many goods that could make money in their hands?

At least neither Li Yulong nor Chen Xin felt that way.

So the two quickly finalized a new cooperation agreement, with Li Yulong providing materials and Chen Xin helping to make snow track wheels.

And because Li Yulong felt that the technical difficulty of this thing was not very high, he also proposed to hope that Chen Xin would teach his people the technology of making snow track wheels, and no matter how bad it was, he would have to learn how to repair it.

After all, snow track wheels are not the same as ground source heat pumps, and compared with ground source heat pumps, which do not require much maintenance after installation, snow track wheels are consumables that are easy to wear.

Although it is not said that it will break after using it once, it is very normal to need to repair it after using it for a period of time, and replace worn parts.

In particular, Chen Xin uses rubber tracks, which obviously wear out and need to be replaced regularly.

Regarding Li Yulong's proposal to let him teach his subordinates, Chen Xin nodded and agreed after thinking about it for a while.

However, Chen Xin did not say that he would teach them production techniques, but only agreed to teach them maintenance.

Although he felt a little regretful that Chen Xin did not agree to teach his subordinates manufacturing techniques, it was already very good to be able to master the maintenance technology, so Li Yulong did not feel any dissatisfaction, and readily agreed to this matter.

Not only that, Li Yulong also followed Chen Xin very enthusiastically, wanting to see how he made snow track wheels.

Chen Xin didn't mind Li Yulong's actions of following him, and after his subordinates moved all the supplies and materials sent into his storage room, Chen Xin also sat down in front of the workbench, preparing to make the first pair of snow track wheels.

Ding Ning and Qin Lan, who were temporarily living here, naturally surrounded him for the first time, quite curious to see how Chen Xin made things.

In the face of the onlookers of the three people, Chen Xin didn't care, and directly used the system interface to call out a waste tire from the warehouse and began to transform.

In the system interface, a scrap tire that had been smoothed out of the grooves was quickly melted, then re-deformed and processed, and woven into a new shape along with the steel wire lining inside, and a rubber track assembly soon appeared on the new workbench.

Chen Xin's eyes could naturally see how this waste tire was turned into a track assembly, but what he saw in the eyes of Ding Ning, Qin Lan and Li Yulong, the onlookers, was how Chen Xin cut a waste tire, then flattened it, cut it to a suitable size, and then finely processed it into a track assembly.

"Brother Xiao Chen, your hands are really skillful! A scrap tire can be played with in your hands! Li Yulong couldn't help but admire, and even Ding Ning and Qin Lan on the side couldn't help but echo.

Chen Xin didn't care about the compliments of the three, and said to Ding Ning: "Xiao Ding, help me bring the parts that are done over there." ”

Hearing Chen Xin's order, Ding Ning naturally helped Chen Xin very diligently take the parts he had made before and put them in front of Chen Xin.

In addition to the track itself, the components of the track structure also have components such as driving wheels, load-bearing wheels, inducing wheels and supporting pulleys, in which the driving wheel is a mechanism that conducts power to the track through the meshing of gears and track teeth.

However, the snow track wheel made by Chen Xin is only a track component, and it does not need the driving wheel to provide power, so he did not design this part on the snow track wheel, only the load wheel, the induction wheel and the carrier pulley.

As the name suggests, load-bearing wheels are used for load-bearing and regular tracks; The induction pulley is responsible for inducing and supporting the track, while the carrier pulley is used to support the upper track.

In addition, although there are many supporting parts, the snow track wheels are not tank tracks, and the structure is not so complicated, so it is much easier to make.

Just assemble the wheels to the brackets that have already been made, assemble the track assemblies, attach them to the wheels, and finally install the fixed components, and a snow track wheel is ready.

Looking at the finished snow track wheels, Chen Xin felt that this thing looked really rough enough.

But it doesn't matter, after all, the crawler itself is associated with the impression of being stupid and black, as long as it is easy to use, even if it is rough, it doesn't matter.

And this is also the consensus of Ding Ning, Qin Lan and Li Yulong, who were watching next to Chen Xin.

As long as it's easy to use, why bother if it's rough or delicate?

In this kind of apocalypse, if you want to investigate whether the shape of something is good-looking or exquisite, it can only be said that you either have a bad brain or are too full.

"Brother Xiao Chen, is this the snow track wheels? How does this stuff work? Li Yulong looked at the snow track wheels that were made by Chen Xin, and asked him curiously.

Chen Xin knocked on the snow track wheels assembled in front of him, and explained to the three onlookers behind him: "Through a backing plate, let the wheels snap into this card slot, and then fix these fixings to ensure that this thing will not slip off. ”

"Wow, wouldn't that be convenient?" Ding Ning on the side let out an exclamation of admiration.

Chen Xin nodded slightly: "Although in terms of transmission efficiency, it is not as high as the power of directly dismantling the wheels and replacing the track structure, but in terms of the convenience of use, this kind of snow track wheels is much more convenient, and it is much simpler to install it when you want to use it and remove it when you don't use it, which is much simpler than replacing the wheels." ”

Listening to Chen Xin's introduction, the three onlookers couldn't help but nodded, they didn't understand anything, and the difference between directly changing tires and installing this kind of track wheel was naturally clear, but it was obvious that this kind of track wheel made by Chen Xin was obviously more suitable for use now.

After all, most of the vehicles are still wheel structure, want to remove the wheels and replace them with tracks, not only the replacement process is cumbersome and troublesome, but also requires professional and technical personnel to operate, how can there be this kind of track wheels only need to be placed on the ground, and then drive the car up is simple and convenient?

Seeing the production of the first track wheel, Li Yulong suddenly couldn't wait to say to Chen Xin: "Brother Xiao Chen, make the other three as well, let's install them and try the effect!" ”

When Chen Xin heard him say this, he also nodded and said to him, "Go and help me move a few more waste tires." ”

Hearing Chen Xin's order, Li Yulong hurriedly ran to Chen Xin's storeroom.