... Serrated,I-shape 4Hot-dipped galvanized,Painted,Untrea Galvanized steel grating Steel grating standards:A. China: YB/T4001-1998B. ... Port engineering, Oil and grease chemistry, Agriculture husbandry, Horticulture, Steel industry, Waste disposal, Food processing, Aquatic breeding, Fertilizer industry ... It has good ventilation of light and wind, a modern sense, aesthetic appearance and anti-skid. It is ...