box irons造句

• There is a steel iron factory and two sets of production line . we have been able to produce all kinds of round steel, screw-thread steel,-steel, box iron, angle steel, h-rolled steel and those what you need to process
  我公司下属轧钢厂一个，有二套专业生产线，可以生产各种圆钢螺纹钢工字钢槽钢角钢h型钢，可以按用户要求搞原材料加