Wind power generation refers to the conversion of wind kinetic energy into electrical energy. Wind energy is a clean and pollution-free renewable energy, which has long been used by people, mainly through windmills to pump water, grinding, etc. People are interested in how to use wind to generate electricity.
The lightweight of the car is to reduce the quality of the car as much as possible under the premise of ensuring the strength and safety performance of the car, so as to improve the power of the car, reduce fuel consumption, and reduce exhaust pollution. Experiments have shown that when the weight of a car is reduced by half, fuel consumption is also reduced by nearly half. Due to the need for environmental protection and energy saving, the lightweight of automobiles has become the trend of the development of automobiles in the world.
Rail transit refers to a kind of transportation means or transportation system that the operating vehicles need to run on a specific track. In the national standard "Common Terms and Terms of Urban Public Transportation", urban rail transit is defined as "the general term of rapid mass public transportation that is usually powered by electric energy and adopts wheel-rail operation mode."
A pressure vessel is a closed vessel that can withstand pressure. The use of pressure vessels is very wide, it has an important position and role in many departments such as industry, civil, military and many fields of scientific research.
Carbon thermal field materials refer to materials that can maintain stable properties under high temperature environment. Common carbon thermal field materials include carbonized silicon, carbonized boron, graphite and so on. These materials have good thermal conductivity and high temperature resistance, and are widely used in winter fields
Leisure sports is a kind of sports activity for the purpose of leisure. It is in the fast-paced working and living environment of modern society, people use their leisure time to actively and casually experience a variety of physical activity-based entertainment and fitness process, which is an essential exercise for body relaxation.
Aviation refers to the navigational activities of manned or unmanned aircraft in the Earth's atmosphere; Spaceflight refers to the navigation activities of manned or unmanned spacecraft outside the Earth's atmosphere, also known as space flight or space navigation. In order to expand social production, human beings must open up new activity space. From the land to the sea, from the ocean to the atmosphere, and then to space, is such a process of gradually expanding the scope of human activities.
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