ISRI CODE:200 - No.1 heavy melting steel. " Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not ov~r 60 x 24 inches (charging box size) prepared in a manner to insure compact charging.ISRI CODE: 201 - No.1 heavy melting steel 3 feet x 18 inches. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 36 inches x 18 inches (charging box size) prepared in a manner to insure compact charging.ISRI CODE: 202 - No. 1 heavy melting steel 5 feet x 18 inches. Wrought iron and/or steel scrap 1/4 inch and over in thickness. Individual pieces not over 60 inches x 18 inches (charging box size) prepared in a manner to insure compact charging.
參考答案:it is difficult ah
