time-and-frequency standard
... CESIUM TIME AND FREQUENCY STANDARD 铯原子钟 time-and-frequency standard 时频标准 frequency time standard 频率时间标准 ...
基于1个网页-相关网页
短语
原级时频标准
primary time and frequency standard
频率时间标准
frequency time standard
时间频率标准
time and frequency standard
·2,447,543篇论文数据,部分数据来源于NoteExpress