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Construction materials and their products used to decorate all kinds of civil buildings to improve their function and beauty, and to protect the stability and durability of the main structure under various environmental factors. Also known as decoration materials, finishing materials. There are mainly grass, wood, stone, sand, brick, tile, cement, gypsum, asbestos, lime, glass, Mosaic, soft porcelain, ceramics, paint and coatings, paper, ecological wood, metal, plastic, fabric, and a variety of composite products. Divided into 3 categories according to the main use