Grid, also known as steel grid, steel grid or grid plate, is made of flat steel and twisted steel welding, fine steel grid durable, relative to other products more affordable price, its main use in power plant platform, parking platform, maintenance platform, ditch cover and step plate. Also used in environmental protection equipment and sewage treatment, precision grille is widely used in petrochemical, electricity, tap water, sewage treatment, port dock, building decoration, shipbuilding, self-walking parking lot, municipal engineering, sanitation engineering and other fields platform, walkway, trestle, ditch cover, manhole cover, ladder, fence, etc.