In order to strengthen international scientific and technological exchanges and cooperation, the first China International Science and Technology Expo will be held at the China International Exhibition Center in Beijing from October 26 to 31, 1993. This is a large-scale international science and technology exhibition in which science and technology are the mainstay and multidisciplinary and multi-disciplinary. Science and technology are primary productive forces. The purpose of hosting this international science and technology expo is to pave the way for the introduction of technology in China, for international technology,
Brass is a special copper alloy. Brass is an object made of an alloy of copper and zinc. It gets its name from its yellow color. Brass with 56% to 68% copper has a melting point of 934 to 967 degrees. Brass has good mechanical properties and wear resistance. Because of its unique advantages, it has become an important part of the parts manufacturing industry. It is generally used for precision copper parts such as automobile parts, medical parts and electrical parts.
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