“national primary frequency standard”的概念、定义、翻译、参考文献-科学参考

单词	national primary frequency standard
释义	national primary frequency standard Encyclopedia 工学频率标准释 national primary frequency standard秒长国家计量基准直接复现秒定义的实验装置。输出的标准频率具有最高计量学特性，作为统一全国秒长量值（频率量值）最高依据的计量器具，全国只有一套。
随便看	strongly plurisubharmonic function strongly polynomial-time algorithm strongly primary ideal strongly primary ring strongly pseudoconvex domain strongly pseudoconvex function strongly pseudoconvex manifold strongly pseudoconvex set strongly quasi concave function strongly quasi-concave function strongly quasi-convex domain strongly quasi convex function strongly quasi-convex function strongly recurrent strongly recurrent measurable transformation strongly reducible maximum triangular algebra strongly regular graph strongly reversible semigroup strongly separated strongly stable manifold strongly stable solution strongly stationary distribution strongly stationary process strongly summable series strongly triple-free set

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