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赫兹
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赫兹hertz 【化】 hertz 赫兹hèzī(1)[Hertz,Heinrich Rudolf]德国物理学家(1857―1894)。第一个播出并接收了无线电波。指出无线电波的振动性及其反射、折射特性与光波和热波相同,肯定了光和热都是电磁辐射(2)[heltz]周期性过程的频率单位,等于1次/每秒
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product cell
product certification
product charge
product classification system
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product code
product collector
product comparison
product concept
product costing
product costs
product demodulator
product design
product design outline
product detector
product determined industry
product development
product differentiation
product discharge door
product diversification
product drawing list
product engineering
product examination
product features
product form
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更新时间:2026/6/9 20:28:55