Since the 20th century, the development of electrical systems has made energy sources more exploited, the industrial layout is also more reasonable, allowing electrical applications not only to profoundly influence both aspects of the production of social material and increasingly penetrating into all levels of daily human life. The level of development and the technical level of the electricity system has become one of the signs of the economic development of nations. With the development and progress of society, the demand for electricity of the whole society is increasing. In the modern world, electricity has become an essential part of human life.<br>
正在翻译中..