... 3. ISO 9001:2000 4.Used in flooring,walkway galvanized steel grating:Manufacture Method: pressure welding steel grating ... according to different application environment. Surface Treatment: hot dipped galvanized, electro galvanized, paint, anti rust oil, original.Features: saving material ... , decrease windage, simple design, etc.NO.Vertical spacing line spacing specification (wide x thick)20×325×332×340 ...