1.Material:St.St./Al.Alloy 2.With Yellow Resin Demarcation Line optional 3.CE & ISO9001 ... resistance, easy to clean and maintenance, weight more than aluminumb).Aluminium alloy Step: Surface bright, Light weight, High strength, Corrosion resistance, ... In July, 2009, our company renewed the manufacturing licence of special equipment (escalators and automatic sidewalks).3. In October, 2009, Enterprise ...