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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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system-based auditing
system board
system building
system bus
system chart
system check
system code
system command interpretation
system communication
system constants
system consultant
system control block
system controller
system control panel
system control unit
system convention
system conversion
system deadlock
system default profile
system definition
system design
system designer
system design generation
system designing
system development
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更新时间:2026/3/16 13:13:41