UNI 7209-1973
热轧钢成品0.用于铁路车辆制造的圆形;方形;扁形和宽扁形钢材.尺寸和偏差.分类UNI 6021-67.UNI 6013-67.UNI 6014-67和UNI 6557-69
Hot rolled steel finished products. Round bars, square bars, flat bars and universal plates for construction of railway vehicles and traction units. Dimensions and tolerances.