以下为句子列表：
英文: Based on the summarization of current situation of fluorine-free mould fluxes at home and abroad, the main problem during decreasing fluorine for high carbon steel and peritectic steel mould fluxes was analyzed, which includes the stability between viscos
中文: 摘要综述了国内外无氟连铸结晶器保护渣发展状况，分析了目前高碳钢和包晶钢（特别是亚包晶钢）用保护渣降氟过程中面临的主要问题：高温时粘度－温度特性的稳定性以及保护渣结晶性能的有效控制。
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英文: In this paper, the internal transverse cracks of continuous casting slabs of a niobium-bearing peritectic grade of steel are investigated using electron probe microanalyser and optical microscope.
中文: 摘要连铸坯厚度中心存在的内裂纹在后续的轧制过程中轧不合而对产品的质量带来重大的影响。
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