... : 1.5-32.0mm 2. Advanced Roller Extrusion equipment line. 3.CE,ISO JIS Rectangular Tube 1. STANDARD:GB/ ... textile machinery, papermaking machinery, food machinery, electrical equipment, sanitation equipment.(2).Roads and Bridges: railway, aviation, expressway, overpass, road fence ... in this area.We engaged in research square and rectangular steel tube at the beginning of company established, now ...