铁和碳的合金steel

• 圆钢

  round bar

• 方钢

  square bar

• 扁钢

  flat bar

• 高级优质钢

  high-grade good-quality steel

• 高级钢

  high-grade steel

• 合金结构钢

  structural alloy steel

• 炼钢

  make steel

• 出钢

  tap steel

• 钢窗

  steel casement