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144和165区别大吗

更新时间: 2020-11-04 00:00:00     

视觉上看上去不大或者说人眼无法分辨。Hz,中文名赫兹,简写为:赫,是频率的基本单位,为纪念发现电磁波的德国物理学家海因里希·鲁道夫·赫兹(HeinrichRudolfHertz)而得名。赫兹是电,磁,声波和机械振动周期循环时频率的单位。即每秒的周期次数(周期/秒)。

关键词: 区别

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