07 关键词 ：熔铸装药；逐层冷却；热芯棒；固化；补缩 [gap=686]Keywords: Melt casting detonator; Gradually cooling; Hot mandril; Solidify; Fill shirking
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hot mandril
热芯棒
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Scanning Electronic Microscope(SEM)and EDAX were used to analyze the surface defect of mandril for hot rolling steel tube. Appearance and growth of the surface defect were investigated and discussed.
采用扫描电镜及能谱分析对热轧管用失效芯棒的表面缺陷进行分析，探讨了芯棒表面缺陷的产生原因和长大机理。
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