"China, heh, can't be built in a hundred years! "In 1997, Germany used a second-hand shield machine to take away 700 million US dollars from China, but let the shield machine made in China reach the world's advanced level!
What is a shield machine? It is a type of tunnel boring machine.
For example, the mountain tunnels through which our trains, high-speed railways and highways pass, as well as submarine tunnels and subway tunnels, are constructed with this kind of roadheader.
It is said that the inspiration for the invention of this excavation artifact was the ship maggot.
At the end of the 18th century, Britain**, which dominated the world at that time, wanted to dig a traffic tunnel under the Thames, but did not have the corresponding technology.
Engineer Lunoll has made countless demonstrations, but he has never been able to find a good way.
Just when he was helpless, he happened to see a ship maggot digging a hole in the hull, and suddenly he was inspired, and through many explorations, he invented a machine that uses the principle of shield to dig tunnels.
The core technology of the machine invented by the West is naturally monopolized by the Western world, and other countries can not get any technology except for spending the best money to buy the machine.
With the development of China's economy, in the nineties of the last century, China urgently needed to build a Qinling Tunnel.
There is no doubt that the strength of the Chinese people is infinite, and the world-famous Red Flag Canal was built by us shoulder-to-shoulder.
However, the Qinling Tunnel Project is too huge to be completed in a short period of time by manpower alone. Moreover, the speed of China's economic development cannot wait, so two second-hand shield machines were imported from Germany.
The conscience of Western countries is black, relying on the monopoly of technology, deliberately calling the first price sky-high, two shield machines and other expenses, enough to knock out more than 700 million US dollars in China.
In order to open the Qinling Tunnel as soon as possible, my country broke his teeth and swallowed it in his stomach, and took out this sky-high amount of money in pain.
Although the machine was bought, we did not master the repair technology, and later when digging for production, the Germans continued to jam our necks.
Every time the machine breaks down, we have to spend ** to bring in a maintenance engineer from Germany.
What's more, when German engineers are repairing the machine, they also have to put a cordon around the machine, not allowing a single Chinese to approach, to prevent us from secretly learning.
Sometimes, the engineer can't make repairs in time, and the project can only be stopped and waited.
In order to get out of the predicament as soon as possible, Chinese technicians have suggested to the relevant departments to manufacture their own shield machines.
After many demonstrations, in 2002, the national key project 863 plan was officially launched, and the shield mechanism caused the first project to be overcome.
When I heard that China was going to produce its own shield machine, Western countries laughed off their big teeth, thinking that China had no technology and no talent, and wanted to manufacture a shield machine, which was really a fantasy.
Knowing that there are tigers in the mountains, this is the challenging spirit of China's engineers and technicians.
In order not to let Western countries see jokes, scientists have explored and studied little by little on almost blank technology, with the tenacity characteristic of the Chinese.
After six years of hard work day and night, China's first domestic shield machine "China Railway No. 1", which was researched and produced by itself, was finally put into use in 2008.
As soon as it was put into use, "China Railway No. 1" exerted its extraordinary power, and the 1,500-meter tunnel of the Tianjin Metro was dug through, which became its debut in the world, and slapped a resounding slap in the face to Western countries.
The successful use of the first shield machine, as well as the power and efficiency it produces, greatly encouraged the self-confidence of our technicians.
After many improvements and upgrading, by 2017, China's shield machine manufacturing technology has reached the world's top level, and the shield machine produced is not only stable in performance, but also inexpensive, exported to France, Denmark and other Western countries, and its sales have reached the forefront of the world, earning a lot of foreign exchange for China.
From importing sky-high second-hand shield machines to Germany to exporting a large number of shield machines to all over the world, China has achieved leapfrog development in this regard and completed a gorgeous turn that only China has.
In 2020, China's Victory shield machine, which is specially customized for Russia, can be used in extremely cold areas, and the use efficiency is very high.
Chinese technicians do not hide their secrets at all, and teach Russian technicians installation and maintenance techniques hand in hand.
China is different, and its responsible great-power demeanor dwarfs that of Western countries. China's deeds have won unanimous praise from friendly countries in the world.
Therefore, no matter how Western countries blockade and suppress, they cannot frighten the hard-working, brave and intelligent Chinese, we can not only break the monopoly of Western shield machines, but also break the barriers of any technology.
Look at the soaring achievements of companies such as Huawei and BYD, all of which have broken down Western barriers.
So, please stretch out your thumbs and praise my country and the wisdom of our people!
Author: The Eye of the Night.
Editor: Zhen Zhen.