“metrology in the field of time and frequency”的概念、定义、翻译、参考文献-科学参考

单词	metrology in the field of time and frequency
释义	metrology in the field of time and frequency Encyclopedia 工学时间频率计量释 metrology in the field of time and frequency时间频率计量利用秒作为基本单位的测量及其应用的科学。是实现时间频率相关量单位统一、量值准确可靠的活动，计量学的分支之一。
随便看	HART协议 Harun Hashim Rashid Harvard Annual harvard architecture Harvard Art Museums Harvard Bulletin Harvard Business School Case Bank Harvard Circular Harvard classification Harvard College Observatory Harvard Library Harvard Peabody Museum of Archaeology and Ethnology Harvard Photometry Harvard pulsar Harvard red book Harvard Region Harvard Revised Photometry Harvard-Smithsonian Center for Astrophysics Harvard-Smithsonian Reference Atmosphere Harvard Standard Region Harvard structure Harvard University Harvard University research team Harvard variable Harvard-Yenching Institute Sinological Index Series

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