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介绍了ＺＭ５镁合金在石膏型铸造中所产生的气体，并对这些气体及铸件表面膜进行定量或定性分析，以这种分析结果研究了防燃机理。
The gas produced by ZM5 magnesium alloy in gypsum casting is introduced, and the quantitative analysis or qualitative analysis of these gas and casting film is carried out. The ignition mechanism of ZM5 magnesium alloy is studied.