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ρ: the fabric density and the unit is kilogram for every cubic meter (kg/m3) as well as the steel substance density is 7850 kg/m3;Secure Harmless. The serrated area can defend pedestrian from slipping down and safe the Secure of pedestrians.Dikarenakan steel grating handbook bisa dipesan dengan ukuran dan dimensi khusus sesuai dengan kebutuhan pro