... reduction function, it can be divided into sound-absorbing board, insulation board and two mixed-type, it currently is commonly used ... and insulation. From the form of production, screen stand board could be divided into perforation-type, foliage-type, up- ... safe, reliable, and heat-resistant, acid-resistant, anti-corrosion, fire prevention, waterproof, anti-ultraviolet, and with an average life of 20 ...