primary frequency standard的意思|示意

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primary frequency standard相关短语

1、 5071A Primary Frequency Standard 铯原子钟

2、 frequency primary standard 频率基准

3、 primary time and frequency standard 原级时频标准

4、 primary cesium beam frequency standard 原级铯射束频率标准

5、 time and frequency primary standard 时间频率基准