双欣环保：公司特种纤维产品主要用于建筑领域，可代替石棉作水泥制品的增强材料

Group 1 - The company's specialty fiber products are primarily used in the construction sector, serving as a substitute for asbestos in cement products [2] - These products are widely applied in various construction projects, including residential buildings, airport runways, dams, tunnels, bridges, and high-grade highways [2]