tianjin cheap PC steel strand
steel strand 1. tensile strength : 1860Mpa 2. diameter : 15.2mm and 12.7 mm and 9.53mm 3. standard : ASTM A416
tianjin cheap PC steel strand
steel strand 1. tensile strength : 1860Mpa 2. diameter : 15.2mm and 12.7 mm and 9.53mm 3. standard : ASTM A416
tianjin cheap PC steel strand