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体温计的汞含量有多少

更新时间: 2020-11-05 00:00:00     

体温计的汞含量不得超过0.1ppm,ppm是百万分之(几),或称百万分率。

汞是一种银白色液态金属,常温中即蒸发,人体吸入汞蒸汽后或吸入固体汞颗粒后会发生汞中毒。

关键词: 体温计 含量 多少

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