声明显示，美国能源部门指定用于炼钢的煤为关键材料。
news flash·2025-05-22 22:58
Group 1 - The U.S. Department of Energy has designated coal used for steelmaking as a critical material [1]
Group 1 - The U.S. Department of Energy has designated coal used for steelmaking as a critical material [1]