As a key technical indicator for the improvement of civilization and scientific and technological level, it is naturally very difficult to improve material technology. Wang Bin''s special glass technology is a material technology.

    At the same time, even Steve, they copied Wang Bin''s glass and produced it on a large scale! At most, Wang Bin only lost orders in Steve''s world, which will not have much impact on Wang Bin''s interests in the mall.

    What''s more, even if Steve''s world can imitate glass, it can''t be sold in the technology mall, so Wang Bin doesn''t worry at all.

    Finally, Donald has placed some orders with Wang Bin over this period of time, and the quantity is also a lot. It adds up to about ten tons, but as in the past, the glass ordered by Donald this time is only flat glass, not other types of glass.

    At the same time, Donald also ordered a batch of screw rods from Wang Bin and Tiangong technology during this period, but the quantity is not large, but fortunately, all of them are screw rods with secondary and tertiary accuracy, with a total of about a hundred energy coins.

    In short, during this period of time, Wang Bin has earned about 1000 Energy coins in the mall, that is, he has almost met the requirements of energy coins required for upgrading.

    What''s worse now is the influence of the products produced by Tiangong technology on the real world and the purchase of one technology from the system to meet the standards of three technologies.

    However, Wang Bin is no longer worried about the technical requirements or the impact of products on the real society. After all, as long as the energy currency is in place, Wang Bin can buy from the system, that is, the energy currency in Wang Bin''s hand can buy some materials similar to the top materials in the real world from the system at any time.

    But Wang Bin wants to save more energy coins and buy more advanced technology.

    In terms of the impact of products on the real society, now their Tiangong technology is also actively promoting. After all, there was no large-scale production line before. Even if there were no products, there was nothing they could do.

    Now the large-scale production line will be completed soon, so they can provide special glass for 969 group on a large scale, which will naturally have a greater and greater impact on the real society.

    In the office, Wang Bin is sitting leisurely in the office chair, drinking tea and checking the situation in the factory during this period of time.

    At this time, the people in his office were knocked. After Wang Bin promised, Jiang Zongliang came in from the outside and said to Wang Bin, "President Wang! Just received the information from Jiang Fei, and their company will hold an investment promotion meeting in a week, so I hope we can participate in the investment promotion meeting of their company in a week!"

    As a matter of fact, Wang Bin has already received news from chief engineer Lin of 969 group. During this period, Tiangong technology has been actively preparing for this. For example, they have produced some glass dedicated to aircraft, conducted a series of tests on these glass, and combined with the data he sold to the customers of the technology mall, To determine the thickness of the required glass.

    After all, the thickness of glass is very important for aircraft, especially military aircraft, and Jiangfei is a professional manufacturer of military transport aircraft. It is too thin, not to mention its defense ability. Even the impact of birds may lead to aircraft destruction and human death.

    Of course, the situation of being hit by birds, resulting in glass breakage and human death, basically does not exist for Wang Bin''s glass of Tiangong technology.

    After all, the impact resistance of Wang Bin''s glass, even if it is a millimeter thick, can reach more than 40 meters per second, which is relative to the speed of more than 150 kilometers per hour.

    Naturally, as aircraft glass, it is impossible to use only one millimeter thick glass. As cockpit and hanging window glass, it should be at least four millimeters thick. As long as these glasses of Tiangong technology can reach the thickness of four millimeters, they basically have the ability to resist the impact of 2.5 kilograms of thick iron at the speed of sound, Therefore, it is impossible to damage the glass of these aircraft at the flight speed and altitude of birds. Unless the aircraft is flying at several times the speed of sound and hits the glass, and the thickness of the glass is still less than 4mm.

    Therefore, what Wang Bin and his colleagues want to test is naturally the anti-collision ability of these glasses in extreme environments. As the glass of military aircraft, they will face all kinds of extremely harsh environments at any time in the future. For example, in the case of heavy fog, the glass must maintain a good line of sight level, and even there can be no fog on the glass.

    In the long-term hot environment, the glass surface must not show any signs of weathering. In the snowy environment, the glass surface must not freeze and fog, and even maintain high thermal insulation performance to keep the temperature in the aircraft fuselage high, so that the heat in the aircraft will not be scattered outside through the glass due to the weather outside.

    Therefore, Wang Bin specially applied to 969 group for high-speed wind tunnel test, and also proposed to northwest UAV company to buy a supersonic UAV specially used for test to test this glass.

    This glass is worthy of the professional Aerospace glass of kanxing world. It has shown good performance in the tests of these projects. Even during the test of Xichang, the glass tested on the UAV was directly hit by lightning due to thunderstorm, but the glass was not damaged at all.

    "I know about this. Go talk to Professor Hu zaifeng and let him get ready. Then I will go with Professor Hu!" said Wang Bin.

    Since Wang Bin purchased the special bearing steel technology of kanxing''s first generation aircraft engine bearing from the system last time, Wang Bin directly handed over this technology to Professor Hu and asked him to toss about it. At that time, Professor Hu zaifeng naturally asked about the source of Wang Bin''s technology, but Wang Bin just found a reason to deceive the past, and Professor Hu zaifeng didn''t ask more.

    However, from Professor Hu''s expression at that time, Wang Bin can be sure that Professor Hu thought it was developed by Wang Bin himself. After all, Professor Hu asked a lot about the difficult technologies in this bearing steel, and Wang Bin answered them one by one. How can Hu zaifeng not doubt that this technology was developed by Wang Bin himself!

    What''s more, although there are great differences between the previous special glass production technology and the current special steel technology, it is material technology anyway.

    The most important thing is that both the previous special glass technology and the current special steel technology have a very big common point, that is, the high temperature resistance of these materials is very excellent, reaching more than 2000 degrees, and even the maximum high temperature resistance of this bearing steel is even better, reaching 2400 degrees.

    Wang Bin did not explain this. After all, there is really nothing to explain. In fact, this is also the result Wang Bin wants.