HS code-based invoice matching

The HS code-based invoice matchingdevelopment history of the engine: from the steam engine to the turbine engine Humans'sThe pursuit can be traced back thousands of years ago, but the birth of the real engine took place in nearly two centuries. The development process from steam engines to turbine engines has a long history, and there are many stories of ups and downs. This article will lead readers to review the development history of the engine and explore the technological change and innovative spirit behind it. I. Steam engine Steam engine is an important milestone in the history of engine development and is regarded as the first real engine. At the end of the 18th century, steam engines were widely used in Britain, mainly used in coal mines, textile factories and other industrial fields. The principle of the steam engine is to use the high pressure generated by steam to promote the piston movement and convert thermal energy into mechanical energy. The advantages of steam engines are strong power, stable power, and can use any fuel. However, steam engines also face a series of problems, such as low efficiency, loud noise, high emissions, etc.In addition, the volume and weight of steam engines also limit their application in the field of transportation. II. Internal combustion engine The internal combustion engine was invented at the end of the 19th century, which directly converts the thermal energy generated by fuel combustion into mechanical energy without the help of steam. The principle of the internal combustion engine is to ignite the mixed gas in the cylinder to make the piston move under force, thus driving the machine to work. The internal combustion engine is not only highly efficient and powerful, but also can achieve the characteristics of controllable speed and controllable steering. The development of internal combustion engines has gone through a century of hard work and exploration. The fuel used in the original internal combustion engine was gasoline, which is what we usually call a car engine. Later, with the invention of the diesel engine, the internal combustion engine could use more economical and environmentally friendly diesel fuel. The small volume and weight of the internal combustion engine make it widely used in transportation, aircraft and other fields.III. Turbo engine Turbo engine is a high-efficiency engine that appeared in the mid-20th century, also known as "jet engine". The principle of the turbine engine is to use the high-pressure airflow generated by air acceleration to drive the turbine to rotate and generate kinetic energy, and then drive the flight or navigation of the aircraft or ship. The advantages of turbine engines are high fuel efficiency, low noise, less emissions, light weight, etc. However, the disadvantages of turbine engines are also very obvious, such as high maintenance costs and high failure rates. The emergence of turbine engines represents that engine technology has crossed a new milestone and become the mainstream driving force of modern transportation and air transportation. IV. With the increasing prominence of global energy problems, new power sources are gradually attracting people's attention. The application of new clean energy sources such as solar energy, wind energy and geothermal energy has begun to become an important strategy and national development direction of governments.At the same time, there are also continuous innovations and applications of new energy storage technologies and electrification technologies, such as lithium batteries, vehicle networking, etc. These new technologies are providing power support for a new round of transportation and air transportation. The development of new power is of great significance to the future development of mankind. It represents a more rational and efficient way of human energy use, and also represents human efforts and pursuits to protect the environment and achieve sustainable development. In a word, from steam engines to turbine engines, the development process of engines is the epitome of technological change in the machinery industry. It reflects the spirit of continuous innovation and exploration of human beings in the process of finding motivation, and also reflects the rational needs of human beings for high efficiency, low energy consumption and environmental protection. With the popularization of scientific and technological innovation and environmental protection awareness, we believe that the new driving force in the future will definitely take a path of innovative development.

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