The near-anti-aircraft is a short-range defensive weapon. It is mainly used to intercept anti-ship missiles and rockets, missiles or aircraft that attack our ships. It can also shoot at sea targets. It is the last barrier of military defense. Therefore, it is necessary to kill and completely destroy the weapons and equipment. Otherwise, they will still cause damage to our army by virtue of superior inertia and kinetic energy. Based on this situation, it is necessary to use the most lethal projectiles. China's near-anti-guns generally use tungsten alloy armor-piercing projectiles. Some people may ask: Why not use depleted uranium bombs, high-explosive bombs, training bombs, steel core bombs, grenades and other shells, and only have a special liking for expensive tungsten alloy armor-piercing bullets?

In our lives, stainless steel can be said to be everywhere, from pots and pans in kitchen utensils to instruments in industrial production, etc., there are countless feelings. However, how does the performance and use of molybdenum change after adding it to stainless steel?

The molybdenum-containing stainless steel mainly has several grades such as 316 molybdenum stainless steel, 316L molybdenum stainless steel and 317 molybdenum stainless steel. Next, let's take a look at the grades, properties, and uses of this molybdenum-containing stainless-steel material.

At present, a variety of home improvement styles can be described as endless, what simple style, rural style, French style, European style, Mediterranean style, Southeast Asian style, post-modern style, fashion mix and match style and Japanese style and so on! Of course, these styles may not be able to satisfy your full retro feelings. Then, can the retro tungsten lamp gradually infiltrate your thoughts that are going back to good times?

In recent years, the accuracy requirements of machine tools for machine tool processing have been continuously improved with the continuous development of China's manufacturing industry. Among them, the precision requirements of wire cutting machine tools are the most urgent. In the online cutting industry, the mainstream “medium wire” is widely used in the fields of mold making, precision small parts, special materials, cams, forming tools and sample processing, because this machine is used to process certain parts. This not only saves time in making stamping dies, but also shortens cycle times and reduces production costs.

Many people will travel to Switzerland to buy expensive accessories, such as "unknown, expensive" Swiss watches (Rolex) and so on. You may know that Swiss law has very strict rules on what is “Swiss Made” and “Swiss Made” watches – the movement uses the “Swiss Movement” logo, the quartz label is “Swiss Quartz”, and the watch box is also marked. On the "Swiss Case", even the strap must have "Swiss Strap". It can be said that a real Swiss watch, there is a "Swiss" logo on the body, I am afraid that we do not know that it is Swiss-made. However, I don’t know if you know that the material of these ornaments, tungsten steel, is not produced in Switzerland, but it is actually produced in China. However, it cannot say "speaking hard", "In fact, I am also from China!".

Barium strontium tungstate cathode as tungstate cathode first appeared in the form of compacted cathode in the 1960s. The cathode is made of barium strontium tungstate (Ba₅Sr (WO₆)₂) as an active material for emission. The synthesized barium strontium tungstate and activator, as well as tungsten powder with a certain size, are pressed and sintered in hydrogen at high temperature.

Unbonded tungsten carbide cemented carbide has better high temperature resistance, wear resistance, corrosion resistance, oxidation resistance and higher hardness than traditional cemented carbide. It is becoming an important development direction of high wear resistant cemented carbide.

Additional material manufacturing is a new processing technology, which is different from the traditional "removal" manufacturing. It does not need the original embryo and die. According to the computer three-dimensional model data of parts directly, it can form any complex shape object by adding material layer by layer. Nowadays, people have given the added material manufacturing a fashionable name - 3D printing.

Tungsten oxide (WO₃) is an indirect bandgap n-type semiconductor material with a band gap of 2.2-2.8eV. It has good absorption of visible light, so it is a very promising semiconductor photocatalyst. In common practice, metal ions are doped into semiconductor photocatalysts, and the recombination of electron-hole pairs can be significantly inhibited by IFCT effect, which can greatly improve the photocatalytic activity of photocatalysts.

At present, the raw materials of organic chemicals and energy industry mainly come from fossil resources such as coal, oil and natural gas. The depletion of fossil resources and the deterioration of ecological environment force people to seek new ways to synthesize chemicals and fuels from renewable resources.