... More Thickness: 3.0-22.0mm 2. Advanced Roller Extrusion equipment line. 3.Certification:CE,ISO SpecificationsSquare Steel Pipe ... More Thickness: 1.0-22.0mm 2. Advanced Roller Extrusion equipment line. 3.Certification:CE,ISO1. STANDARD:GB/ ... , textile machinery, papermaking machinery, food machinery, electrical equipment, sanitation equipment.(2).Roads and Bridges: railway, aviation, expressway, ...