Aluminum is widely used in machinery manufacturing industry. The so-called mechanical manufacturing is the industrial sector engaged in the production of various power machinery, lifting and transportation machinery, chemical machinery, textile machinery, machine tools, instruments and other mechanical equipment. In China, the machinery manufacturing industry is to provide technical equipment and support for the entire national economy. As China attaches great importance to the development of eq

Because of the rapid development of the construction industry, many new technologies have been applied to the construction industry. The emergence of these new technologies has a great impact on the traditional construction technology and solved many technical problems that can not be achieved in the traditional technology. Moreover, the application of some new technologies and construction equipment has greatly improved the efficiency of construction.

Space technology is a comprehensive engineering technology that provides technical means and guarantee conditions for space activities. Space application refers to the use of space technology and its development of space resources in scientific research, national economy, national defense construction, culture and education and other fields of application technology. Space resources refer to all kinds of environment, energy and material resources which can be exploited and utilized for human bei