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With the effective control of the new crown epidemic, Beijing Yatianli Stone's stone construction project at Beijing Daxing International Airport has gradually resumed and progressed in an orderly manner. At present, Beijing Daxing International Airport is under construction as an auxiliary supporting service building. Our company is responsible for supplying stone, and building and processing st

Sandstone is a kind of sedimentary rock, which is formed by stone particles deposited on the river bed through water erosion, and become solid after thousands of years of accumulation. Later, due to the movement of the earth's crust, today's mines were formed. Its main ingredients are: A. Quartz content is more than 52%; B. About 15% of clay; C. About 18% of goethite; D. More than 10% of other sub