Welding and riveting are two associated operation procedures in the production process of structural metallic materials.

铆接工艺中的展开放样、下料、加工成型和连接装配等过程能产生强烈的机械性噪声。

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Magnesium alloys are the lightest structural metallic materials, which can be used to reduce the weight of military equipments and improve their performance.

镁合金是最轻质的金属结构材料，是实现军事装备轻量化和提高军事装备各项性能的理想材料。

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The density of magnesium and its alloys is yelatively low, only accounts for 64% of aluminum density and 25% of steel density, and it is one of the lightest structural metallic materials.

镁及其合金密度小，仅为铝的64％，钢的25％，是目前密度最轻的金属结构材料之一。

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