... 0mm 2. Advanced Roller Extrusion equipment line. 3.CE,ISO Hollow Square Steel Tube 1. STANDARD:GB/T3094-2000, GB/ ... : automobile manufacture, ship manufacture, container, tricycle, tower crane.6. SPECIFICATION: SQUARE TUBE(MM) THICKNESS (MM)SQUARE TUBE (MM)THICKNESS(MM ... experience in this area.We engaged in research square and rectangular steel tube at the beginning of company established, now ...