频率标准 meaning in English

fs frequency standard

Generic specification of rubidium frequency standards
铷原子频率标准通用技术条件
Verification regulation of cesium beam frequency standard
铯束原子频率标准检定规程
Measuring methods for rubidium frequency standards
铷原子频率标准测试方法
Verification regulation of rubidium gas cell frequency standards
铷原子频率标准检定规程
Application of gps technology in researching of frequency standard
技术的频率标准源的研制

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