FIBRPRO® FRP Arched-shape cover is a key sealing device for large spans without intermediate support above the water tanks in water treatment and sewage treatment plants, while its core function is to improve environmental quality and optimize the sewage treatment process. The sliding arc-shaped cover plate can solve the pain point of inconvenient maintenance of traditional fixed cover plates. Customized colors and surface textures make it a combination of environmental protection, efficiency and engineering aesthetics.