Wang Bin replied: "Mr. William, there are no other products in my shop except this glass, but the performance of this glass of Tiangong technology is very excellent. I think this glass can also replace many materials. If you buy it, it is not difficult to use it to process some practical items."

    "Can you? Sir, don''t lie to me. I know the hardness of ordinary glass, not to mention your special glass. Maybe you can process this special glass in your world, but it''s absolutely difficult for my world to process this kind of glass," Donald said.

    "No! No! No! Mr. Donald, I think you are mistaken. Think about it, how advanced the glass performance of Tiangong technology is!

    If this glass is equipped on the chariot of your country, I think this chariot is absolutely indestructible.

    If you install this glass on the aircraft of your country, especially the aircraft of your era, your aircraft and tanks not only have strong defense ability, ordinary machine guns and artillery can not enter, but also will be greatly reduced in weight. In this way, your aircraft and tanks can carry more and larger artillery and ammunition, you can Think about it, what a wonderful thing! "Wang Bin said sincerely to Donald.

    Donald admired Wang Bin after his words. After all, he used glass as armor for aircraft, tanks and other weapons. He didn''t even think about it.

    But it''s normal to think about it. Donald''s world is the world during World War II, or the world just started World War II.

    With the technological level of their era, it is almost impossible to use glass as armor for combat vehicles. Even bulletproof glass is only a conceptual thing.

    Therefore, it is not impossible to use the special glass of Wang Bin''s Tiangong technology as the armor of the equipment.

    Most importantly, for Donald''s country, their country''s resources are very limited. At the same time, even if there are resources, the production of various products also requires workers, equipment and time. However, for them, what they lack most now is personnel and time.

    So Donald thought about it and thought it was not impossible to buy this kind of glass as armor.

    So he thought he could try it first. Donald also wanted to see the scientific and technological level of their world. At the same time, he could also try how far there was a gap with Wang Bin''s scientific and technological level.

    So he said, "Sir, your suggestion is very good! I can buy a small amount of glass to try, but I''m not sure what type of glass to buy.

    After all, I don''t know the specific performance of glass. I don''t know if the shopkeeper can introduce the performance of this glass and what kind of glass I should buy.

    "OK! Mr. Donald! The maximum high temperature resistance of this glass produced by Tiangong technology can reach more than 2100 degrees..." Wang Bin soon introduced the performance of this glass.

    Then he added: "so based on the above data, I suggest that Mr. Donald can buy special glass more than 4mm, preferably more than 5mm.

    After all, special glass less than 5mm, even if it is 4mm, can only resist the shooting of light weapons at most, but it is different if it is more than 5mm. 7mm special glass can resist the shooting of 12.7mm heavy machine gun at least. If it is more than 10mm, it is not a problem to resist small caliber artillery. If you want to resist heavy artillery, you can also adopt it With multiple pieces of glass, superimposed. "

    Of course, Wang Bin had no idea how many millimeters this glass needed to withstand 12.7 mm machine gun bullets and 100 mm heavy guns. After all, he had not tested it.

    However, according to the data of this glass, the impact resistance of a millimeter thick glass is 45 meters per second. If it is two millimeters, its impact resistance will reach 225 meters per second. If it is three millimeters, it will be 337 meters per second. If it is four millimeters, it will reach ten times the impact resistance of a millimeter thick glass, that is, it can resist 450 meters per second relative to its own weight Second speed impact, such anti-collision performance, can absolutely withstand the shooting of general light weapons.

    Donald nodded when he heard what Wang Bin said. Indeed, according to the data Wang Bin said, this glass can indeed be used as armor for chariots and other equipment. Of course, the specific effect still needs to wait until he buys some and goes back for testing.

    "Shopkeeper! Although the performance of your glass is really excellent, the price is still a little high. After all, there are excellent defense materials in the whole technology mall.

    On the contrary, there are still a lot of defensive materials in the technology mall, and many are cheaper in terms of price, "Donald added.

    "Mr. Donald, I don''t deny that some materials in the technology mall are better than our glass in one-way performance, but in terms of comprehensive performance, they are similar to or better than our glass.

    The zero grade area of the whole technology mall is absolutely very few, just one or two, and their price is several times that of me. Even those higher than our glass in terms of one-way performance may not be cheaper than me. " Wang Bin said.

    Of course, at this time, Wang Bin naturally doesn''t know the situation in the technology mall. After all, he can''t get out of his shop now, so what he said is basically his own guess based on the information given by the previous system.

    Although Wang Bin doesn''t know about the technology mall, Donald knows that the prices of many special materials in the technology mall are very high, and some even reach dozens or even hundreds of energy coins.

    Therefore, compared with the price of 15 energy coins, Wang Bin''s glass is not much, and even a little cheap.

    However, it is a good idea to save one energy coin. Donald naturally wants to make an appointment cheaper. Now that the war in their world has begun, no one can predict how long the war will last. If the war in their world lasts a long time, there will be more places to use energy coins in the future, even more energy coins, There will be a day of exhaustion.

    After listening to Wang Bin''s words, Donald did not speak, but frowned. Obviously, he was not satisfied with what Wang Bin said.

    Seeing Donald''s performance, Wang Bin said: "Mr. Donald, the performance of our glass is so excellent and the price is very affordable.

    If you want, Mr. Donald, order quickly, because our glass production capacity is not much, just dozens of tons a month. If you don''t order now, you may not have what you want in a while. "

    "Well, sir, you succeeded in persuading me. I''m going to buy some to try," Donald said.