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简介:李毅中不锈钢复合管介绍,去年钢铁工业冶炼和工业加工利润下降了37%。他从多方面分析了下降原因,首先,我国铁矿石资源不足。其次,钢铁质量有差异。我国产量大,但钢铁含铁量在30%、40%,而国外最高可达62%,不锈钢复合管“如果按含铁量来说千亿国际官方网站下载
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