“atomic-beam frequency standard”的概念、定义、翻译、参考文献-科学参考

单词	atomic-beam frequency standard
释义	atomic-beam frequency standard [ǝ`täm·ik ´bēm `frē·kwǝn·sē ´stan·dǝrd] ^PHYSICS A source of precisely timed signals which are derived from an atomic-beam resonance, such as a cesium-beam cell or a hydrogen maser.
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