The FRP cover plate shall be suitable for use in highly corrosive environmental conditions, and the applicable working environment temperature range shall not be less than - 50 ~ 90 ℃. It has the properties of fire resistance, flame retardancy, UV radiation resistance and strong weather resistance. The content of filler in synthetic resin shall meet the requirements of relevant technical documents. The color of the cover plate shall be coordinated with the surrounding structures and buildings, which can be selected and determined by the owner.