Due to specific properties arising from their structure (high ductility, high toughness,strong tenacious and low heat co......

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用实验方法，发现了引信零件上黑色粉末的来源。用高倍显微镜观察获得了黑色粉末的形状和大小。根据固体物理中金属的微观结构、镀锡......

Due to specific properties arising from their structure (high ductility, high toughness,strong tenacious and low heat co......