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开水瓶的保质期多久

更新时间: 2020-06-29 00:00:00     

没保质期一说,重要的是他的内胆,它的内丹是汞化银一种金属,拓是化学反应产生的银镜反应,用硝酸银和还原物质,甲醛或葡萄糖反应,使银沉淀于玻璃表面,形成镜面。所以这东西很难氧化时间久了用热水烫烫就行。

关键词: 开水 保质期 多久

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