... be divided into perforation-type, foliage-type, up-arc, and down-straight type, split-angle type, straight flat type, convex, concave type, etc. In ... has the features of high strength, safe, reliable, and heat-resistant, acid-resistant, anti-corrosion, fire prevention, waterproof, ... the roads, urban environment.Selection Description 1.The type of sound barrier and specifications could be made according ...