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根据国内外的研究应用情况及作者几年来的研究，提出了在国内大规模应用干砂消失模铸造必须解决的几个关键技术问题
According to the research and application both at home and abroad and the author’s research over the years, several key technical problems that must be solved in the large-scale application of dry sand EPC are put forward