“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	persymmetric determinant persymmetric matrix PERT pertechnetic acid Perth perthes test perthiol Perth Observatory per-time payment pertubed angular correlation technique Pertubuhan Berita Nasional Malaysia perturbance perturbation perturbational method perturbation amplitude perturbation analysis perturbation analysis method perturbation approximation perturbation, disturbance perturbation equation perturbation expanded form of statistical operator perturbation expansion perturbation function perturbation growth perturbation guidance

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