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对国内外无缝钢管热顶头制造技术的研究现状进行了较为全面的论述，探讨了影响无缝钢管热顶头质量及使用寿命的主要因素
The domestic and international hot-head seamless steel pipe manufacturing technology research status quo a more comprehensive discussion of the impact of seamless steel pipe hot-head quality and service life of the main factors