DisadvantagesFirst, the current national standards, such as "Architectural Design Fire Code", "High-rise Civil Building Design Fire Code", "People's Air Defense Engineering Design Fire Code" and other codes are only some principle provisions, can not well guide the design, construction and fire supe

China's deposits of rare earth materials account for more than 80% of the world, and Deng Xiaoping, China's chief designer, once said, "The Middle East has oil, China has rare earths." Rare earth ore is a strategic resource for China. Therefore, nano rare earth materials are the future development direction of our business.

China's deposits of rare earth materials account for more than 80% of the world, and Deng Xiaoping, China's chief designer, once said, "The Middle East has oil, China has rare earths." Rare earth ore is a strategic resource for China. Therefore, nano rare earth materials are the future development direction of our business.

The function and role of signage. First: signage has the function of marking (SIGN), signage is mainly through the visual to show its role, for example, the text conveys, the mark is with symbolic, directional, suggestive and so on. The text style can show the character, background. Shape and mark t