产量下降美国钢铁工业是美国经济的主要基础之一,年生产设备能力目前已达一亿五千五百万吨,约占世界年生产能力总量的五分之二。美国钢铁工业的85%集中在美国东部和中部八州,其中宾夕法尼亚和俄亥俄二州的产量最高,分别占八州总产量的三分之一强和四分之一弱,美国有名的钢都匹茲堡即位于宾夕法尼亚 Decline in output The US steel industry is one of the major foundations of the U.S. economy with an annual production capacity of 155 million tons, or about two-fifths of the world’s annual production capacity. 85% of the U.S. steel industry is concentrated in the eastern United States and the eight central states, of which Pennsylvania and Ohio have the highest yields, accounting for more than one-third of the total output and a quarter of the eight states respectively. The United States famous steel capital Pittsburgh That is located in Pennsylvania