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爱迪生为什么用钨丝做灯丝

更新时间: 2020-07-10 00:00:00     

因为灯丝发光时的温度高达2000多摄氏度,在这样的温度下,一般的金属都已经融化,只有钨的熔点高达3400多摄氏度,同时钨的稳定性也好,所以灯泡里的灯丝用钨丝。

关键词: 为什么 钨丝 灯丝

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