开坯机(The rolled ingot, now in the form of a long thick bar, is reheated and further reduced in a roughing mill and then in a finishing mill. 轧制过的钢锭现在变成一根又长又粗的钢棒，将其再次加热后依次送人粗轧机和精轧机进行轧制。)
双机架开坯机(After attaining the desired temperature in the tunnel furnace, the slab is reduced to a thickness of 26 to 35mm by a two-stand roughing mill. 板坯在隧道炉中加热到预定温度后，使用双机架粗轧机将其厚度减薄到 26 ~ 35mm。)
