Square (Cold Formed) 方钢管 (冷轧)
Rectangle (Cold Formed) 矩型钢管 (冷轧)
Circular (Cold Formed) 圆钢管 (冷轧)
Square (Hot Finished) 方钢管 (热轧)
Rectangle (Hot Finished) 矩型钢管 (热轧)
Circular (Hot Finished) 圆钢管 (热轧)