五金是指哪五金，五金是指用于建筑、机械等行业中的一类金属制品。它们在我们的日常生活中随处可见，却鲜有人知道它们的具体分类和用途。本文将为大家详细介绍五金的分类和具体应用，希望能让读者对五金有更深入的了解。
五金是指哪五金
五金分类
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