“international recommended values of standard frequencies”的概念、定义、翻译、参考文献-科学参考

单词	international recommended values of standard frequencies
释义	international recommended values of standard frequencies Encyclopedia 工学时间频率计量释 international recommended values of standard frequencies国际标准频率推荐值由国际计量委员会（CIPM）推荐的一组电磁辐射标准频率值。为包含实际复现米定义和秒的次级表示在内的应用而设立。
随便看	acoustic pressure sensitivity acoustic problem acoustic property of metal acoustic quantity sensor acoustic radiation acoustic radiation force acoustic radiation impedance acoustic reactance acoustic reflection law acoustic reflectivity acoustic refraction law acoustic refractive index acoustic remote sensing Acoustic Research Centre acoustic resistance acoustic resonance acoustic resonance, sound resonance acoustic resonator acoustic reverberation room acoustics acoustics assessment technology of fisheries acoustics characteristic measuring instrument acoustic sensor acoustic shell acoustic shield

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