Surgical instruments HS code classification

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• 2024-12-24 02:20:38 Surgical instruments HS code classificationSurgical instruments HS code classificationStep 1: Visit official website First, Surgical instruments HS code classificationopen your browser and enter the official website address (spins108.com) of . Surgical instruments HS code classificationYou can search through a search engine or enter the URL directly to access it.Step List of the contents of this article:1, Can China make a Japanese engine2、 Does China have an indepe
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• Why can't Chinese aircraft engines be made

Can China make Japanese engines

1. The reasons why China cannot make engines mainly include the lack of technological accumulation, the limitation of lack of resources, the difficulty of independent research and development, and the lack of cooperation and innovation New.

2. Mitsubishi said: China can't make Japanese engines in 50 years, because the parts of Mitsubishi engines are all finished, and China does not have high-precision machine tools. Even if the engine is disassembled and the parts are copied one-to-one, the performance will not reach the minimum standard of Japanese engines, and the fuel economy They are also very different.

3. However, as far as we are concerned, we do not completely know the technology of initiator manufacturing, but just want to make the same initiator as in Japan.Of course, with China's current level of industrialization, under further discussion, Chinese manufacturing must not be able to manufacture Japanese launchers.

4. Some people also say that since Made in China has been developed to this extent, there is no reason why it can't deal with the small Japanese launcher. The reason why it can't make decent launcher equipment is probably related to the investment of research and development funds.

Does China have self-developed aircraft engines?

1. Can **. China has been able to produce aircraft engines. For example, AVIC has delivered a large number of turbofan 10 engines to the People's Liberation Army, which are used in many models such as J11.

2. The c919 engine is not independently developed by China.The engine of C919 is a LEAP-X1C engine. It adopts many industry-leading innovative technologies.

3. Many of China's aircraft engines are independently developed, such as from vortex spray 5 to vortex spray 14 ("Kunlun" engine), which is the most advanced medium-thrust military vortex jet engine in China, and from turbofan 6 to vortex fan 10 ("Taihang" engine), which has reached the international advanced water Flat.

4. Absolutely, WS9 is an example. Now the only countries that can independently develop aviation engines are the United States, Russia and China.

5. China can develop and manufacture aircraft engines by itself, such as Taihang and Qinling engines, and domestic engines are used for the new J-10.

Can China produce aircraft engines?

1. China can produce aircraft engines. To be precise, China can produce aircraft engines, but not advanced aircraft engines. Modern advanced aviation engines, modern fighter jets, military transport aircraft, civil aviation trunk airliners, etc. all use turbine fan engines.

2. Of course. There are many self-developed aircraft engines.

3. Able. Every type of fighter in China has a matching domestic engine, but the quality is not very good, so sometimes imported ones are used. For example, the J-10 can be equipped with the domestic WS-10A, but because the performance is not very good, most J-10s are equipped with the Russian-made AL-31.

4. OK! Like the "Taihang" large-thrust turbofan engine completely developed by China. Of course, there are many imitation engines, such as turbojet 7 and so on. Recently, the domestic Sbe engine "Qinling" turbofan engine has also been launched as the engine of Flying Leopard.

5. China has been able to manufacture engines for a long time, but its independent research and development ability is relatively weak. 1Since the first turbojet-5 engine was successfully imitated by Shenyang Aviation Engine Factory in 956, China's aviation engine industry has been mainly imitating and improving engines from other countries. Although it has also developed several engines on its own, they all died in the middle for various reasons.

Why can't Chinese aircraft engines be made

mainly because the materials are not good. The technology of domestic engines is still good, but the strength of the materials has not been raised, so this will give people a kind of engine It doesn't feel good. As long as the strength of the material goes up, a good engine can naturally be made.

The bottom is too thin, especially the gap between the basic materials and the basic technology is too big. Although the distance has been narrowed now, it is still about 10 years short of the United States.For example, the engine high-altitude test platform, GE has several times more than China has. Lack of pre-research and insufficient accumulation.

On the other hand, it is the problem of capital investment. Because the structure of the aircraft engine is very complex, it is far from enough to rely on theoretical calculations alone, and a large number of physical tests are needed. In foreign countries, after an engine is designed, thousands of prototypes are often run for testing to ensure its stable and reliable performance.

First of all, China has few talents in this field and cannot introduce foreign talents. They won't come because of political confidentiality factors, etc. Secondly, China's engine research and development ideas have always been problematic, because they have been taking the path of imitation and lack of autonomy and innovation. It's impossible for people to imitate the most advanced things from you.

The research and development of aviation engines is characterized by high technical difficulty, high cost and long cycle.