Frozen goods HS code classification

Engine cleaning carbon,Frozen goods HS code classification you need to clean the engine in this way is the most core part of the car. In the process of driving, startThe opportunity to produce a large amount of exhaust gas such as carbon dioxide and water vapor, which will form carbon inside the engine and affect the normal operation of the engine. Carbon accumulation will lead to a decrease in engine performance, an increase in fuel consumption, an increase in noise, and even cause failure. Therefore, it is very necessary to clean the carbon in the engine. There are two main methods of engine cleaning carbon: mechanical cleaning and chemical cleaning. Mechanical cleaning mainly uses high-pressure water or hydrogen to spray the inside of the engine to clean the accumulated carbon. For chemical cleaning, professional chemical cleaning agents are used to add them to the inside of the engine to decompose the carbon. Mechanical cleaning is the most widely used, safer and more reliable engine cleaning method at present. Mechanical cleaning uses high-pressure water or hydrogen injection inside the engine to clean the carbon. The advantages of this cleaning method are: thorough cleaning,The effect is good, and it can clean up the carbon inside the engine and restore the performance of the engine to the best state. At the same time, mechanical cleaning can also extend the service life of the engine and reduce the possibility of failure. However, mechanical cleaning also has some disadvantages, such as using high-pressure water to clean some spare parts, such as brake discs; at the same time, after cleaning, it needs to be reinstalled and debugged, which requires certain skills and experience. Chemical cleaning Chemical cleaning usually cleans the accumulated carbon by adding detergents to effectively decompose and remove the accumulated carbon accumulated. The advantages of this method are: fast cleaning speed, only less labor and time, and can completely cover the entire engine interior, the cleaning effect is better, and the engine will have obvious performance changes. But in the same way, chemical cleaning also has some disadvantages. During the cleaning process, the volatilization of chemical agents will cause environmental pollution;Long-term use will cause damage to engine parts, such as pipelines, oil seals, etc.; chemicals need to be used accurately to ensure the cleaning effect. How to choose the cleaning method Mechanical cleaning and chemical cleaning have their own characteristics. In order to ensure the performance of the engine, it is usually necessary to consider carefully when choosing the cleaning method. Generally speaking, chemical cleaning is most appropriate for older engines because they have more carbon; for new engines, mechanical cleaning is recommended. The cleaning cycle of the engine cleaning carbon is generally 20,000-30,000 kilometers. However, special attention should be paid to the fact that when suffering from dust, mud, fog and other harsh climatic environments, the cleaning cycle needs to be shortened. Similarly, if the engine uses bad oil, it is necessary to speed up the cleaning cycle to avoid engine damage.In a word, engine cleaning carbon is a very important part of the car maintenance process. It can effectively improve the fuel efficiency of the vehicle, ensure the normal operation of the engine, and extend the service life of the engine. Therefore, we should choose the appropriate cleaning method and clean it according to the recommended cycle to ensure the safety, reliability and long-term use of our vehicles.

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