26 30-ton carriages, don't care where they come from, Zhang Nan and his friends are looking for treasures, not studying the history of World War II, there is no need to delve into these.

But now there is a big problem in front of everyone: the exits on both sides of the tunnel are not expected to be opened again, and the only way to enter the tunnel is the ventilation shaft that is more than 100 meters long.

According to Guan Xingquan's judgment, the 26 carriages below should be fully loaded, and a small number may be slightly overloaded, which is a big problem!

At least 750 tons, or even more than 800 tons, need to be transported out of the tunnel through ventilation shafts, if they are carried by manpower......

Everyone is called by a cow, and a 25 kilogram of back is killed, and 40 people are a ton, which needs to be climbed...

More than 30,000 trips!

I don't bother to calculate the time it takes, the time of a trip, a few people climbing together, a group of people spinning in a row...

No matter how you turn it, it's going to die!

If you do it alone, even if you use yourself as a machine, you will have to move for at least a few years!

Don't expect to rely on manpower, this will make Zhang Nan extremely unhappy to look at that damn slightly inclined ventilation shaft!

"If it's a vertical one, it won't be so troublesome, and you can just put a winch on one side and you can lift things up.

Now the slope is not up or down, and there is still a slip of steel steps on the bottom side, and the winch is not needed at all. You can't cut off all the rebars, otherwise it will be very troublesome up and down......"

Headache, headache!

What to do?

Cold!

Eat first, come to the plate of sesame oil cold salad salted radish in the winter to relieve greasy, has notified more than 200 meters away to stay in the hotel of the guy to deliver the meal, the garage shutter behind everything is fine, in addition to the one on duty, other people gather in the restaurant to eat while thinking about countermeasures.

It's basically a bad idea to think about it, think about it!

In the end, there was a slightly more reliable one, or Zach came up with the idea of the failed Apollo 13 mission to the moon: it is said that after the spacecraft went wrong, engineers on the ground experimented remotely to help the astronauts solve one big problem after another with the tools and equipment they could find, and finally let the three astronauts return to Earth alive.

In a nutshell: professional things are left to professional personnel, but those professionals are not yet able to arrive at the site and remotely simulate solutions.

Zhang Nan clapped: "That's it!"

After the meal, the next group of people began to get busy, measuring the length, angle, diameter and specific internal dimensions of the ventilation shaft, the size of the steel handrail steps, and the approximate expected strength......

And then report these data to New York, where the "United Forces" has its own engineering department, and give a copy. The data was also sent through New York to a copper mine in Chile, where experts in the practical and research of inclined conveyor machinery were conducted.

Just these conditions, there is civil power supply, power generation is also OK, you can design a simple and reliable transmission method according to the requirements!

A group of engineers, technicians, mine experts, and rescue representatives were reminded again of the confidentiality regulations, and they used their brains to make inventions as required.

The secrecy rules are just a precaution, because they don't know who asked for it, what it was for, and where it was used.

The research time is only given for a maximum of 48 hours, after which each is required to quickly do a model simulation test, and then, if possible, get the required kit that can be spliced and transported, and then transport it to the designated place and hand it over to the head office.

It was difficult for Zhang Nan and others to solve the troublesome problem, after this was handed over to the professionals, I didn't think that it was only dinner time on the German side, and the engineers on both sides gave similar solutions, and it didn't take 48 hours at all.

The power is still a winch, because the weight of the items that need to be lifted is not high, to ensure that it is less than 300 kg, and the volume is not particularly large, then use a one-sided slideway and fix it on the side of the row of steel handrail steps in the ventilation shaft.

The difference between the design of the engineers on the two sides is only in the height of the arc of the slideway, in short, this design is half a catty to eight taels.

And that was a happy outcome: in the end, the Chilean design won because they were mines, and the prefabricated steel plates that make up the slides were easier to install than the American engineers, and they were quicker, easier, and less demanding of the quality of the installers.

After that, the guys in Chile started to get busy in the hardware processing factory of the mining group, making all the kits, ensuring quality and quantity, and fast, and when the construction was completed, there would be a cargo plane to pick up the goods.

People don't need to use it, just bring the kits, installation equipment and drawings together.

When the things arrived, it was a matter of a group of bodyguards with a little construction experience.

Thanks to the high labor cost of American society, these guys from the United States basically have strong hands-on ability, building a shelf, screwing a small meaning, and there are many people who can use electric hammers and electric welding.

No way, some manual work is too expensive to hire someone to do it: not to mention the poor in American society, many middle-class families have this craft, and they do it all by themselves, and there will even be technical manual classes such as car repair in the high school curriculum.

As for the guys from Huaxia, it is not for nothing that they have made cameo appearances as construction workers and repairmen, and they have used wrenches and hammers for a long time, and everyone has the basic ability to repair cars.

Mark has worked as a construction worker, and there are several people who have similar experience to him, and it is difficult to build the slide, but it is not difficult for everyone.

......

It takes time to build a slideway kit, and even the measurement data takes time, Zhang Nan will not care about these details, and after the meal, he entered the tunnel with Xiang Weirong and Guan Xingquan, and added Liu Wendong and Paul to see the goods on the train first.

Paul and Liu Wendong first went to check whether there were any particularly large goods in each carriage: on a general basis, it was fine, except for a few paintings that seemed to be large sizes, there were none, at least no ton-heavy sculptures.

Just take a look at it, and don't even open the package, because Zhang Nan said: "If the size is too big, stay here for the time being, and seal the entrance on the top again, this thing can't run." ”

Zhang Nan went to the westernmost carriage with Xiang Weirong and Guan Xingquan, and the sliding door was opened after being pried open, and the rails below were rusty, and it was troublesome to push forward.

The carriage is a wooden floor, not much decay, quite sturdy, and there are layers of large and small boxes of various colors, at least hundreds of larger.

Guan Boss put a battery light in the car door, and jumped on it as soon as he put his hand on it.

There is no platform here, more than a meter high, and I don't have to say anything about my skills.

Xiang Weirong is the same, as soon as he grabs the carriage door with his hand, his movements are comparable to those buddies in the railway guerrillas.

Zhang Nan didn't have the ability of the two of them, so it took a little effort to enter the carriage.

Kwan Hing-kuen lifted the lights and placed them on top of a row of crates opposite the car door so that he could see more clearly.

"The west side seems to be full of gold bricks, and the east half of the east half of the boxes in front of us are gold coins.

Most of the boxes are bank packaging, which should be classified, but a box was found when the goods left the factory, and it was the goddess on the cloud. ”