What project is used for medium sand?

What project is used for medium sand?

Zhongsand is one of the commonly used building materials in construction projects. Because of its characteristics such as moderate particle size, good particle shape and low mud content, it is widely used in various engineering fields. The following are the specific application of Zhongsha in various projects and the 100-plus Chinese characters in the entire network (I want the hot topics and hot contents of the entire network for the past 1,010 days. Write an article. 2. The article is titled as the title of which project Zhongsha is used in. 3. The content of the article should be structured. 4. The content of the article should have no less than 800 Chinese characters. 5. The content of the article is automatically typed. Please use