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北满特钢公司为给无缝管生产线提供质量稳定。成本低廉的圆管坯，该公司与广州南方连铸工程公司合作将原方坯水平连铸机进行了圆坯的转产改造，1997年8月30日一次热试成功。累计试生产合格连铸坯142t，其中包括45、20、27SiMn3个钢号，综合合格率92％，成功地显示了这一改造成
North Manteg Steel Company to provide seamless pipe production line with quality and stability. Low cost of round tube billets, the company and Guangzhou Southern casting company in cooperation with the original billet horizontal continuous casting machine round billets transformation, August 30, 1997 a heat test success. The cumulative production of eligible slab 142t, including 45,20,27 SiMn3 steel, the overall pass rate of 92%, successfully demonstrated that the transformation into