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简介:     不锈钢碳素钢复合管出口492.32万吨,1-9我国不锈钢碳素钢复合管累计出口4690万吨,同比增长15%,累计出口量连续四年出现增长,而且已连续第三年同比增幅出现增长,增幅亦有逐步扩大的趋势
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