对转炉特殊钢生产工艺的技术关键进行了论述.

The key technologies for production of special steel in a converter are also described.

后来逐渐开发了黑色金属的水平连铸技术，现已实现了普通钢和特殊钢水平连铸的工业化生产。

Afterward, it was developed rapid to produce black metal. Now industrialization of common steel and special steel produced by horizontal continuous casting has been realized.

该直接还原铁是电炉冶炼优质钢和特殊钢的理想原料。

Such DRI is a high quality charge for electric arc furnace steel making.

特殊钢焊条专用.

Specially designed contact welding rods.

冶金产品. 供金属构件用的外螺纹紧固件用热处理后的特殊钢.

Iron and steel. Heat treatable steels for externally threaded fasteners for structural purposes.