“national primary frequency standard”的概念、定义、翻译、参考文献-科学参考

单词	national primary frequency standard
释义	national primary frequency standard Encyclopedia 工学频率标准释 national primary frequency standard秒长国家计量基准直接复现秒定义的实验装置。输出的标准频率具有最高计量学特性，作为统一全国秒长量值（频率量值）最高依据的计量器具，全国只有一套。
随便看	Chongwen Zongmu Chongwu Bandao Chongwu City Walls Chongwu Gucheng Scenic Spot Chongxin Xian Chongxu Taoist Temple Chongya Female Opera Class chongyang Chongyang Taoist Temple Chongyang Xian Chongyang’s Fifteen Lessons for the Establishment of the Doctrine Chongzhen Calendar Chongzhi Chongzhou City Chongzhou Daming Temple Two Phoebes Chongzhou Shi Chongzhou Tianyan Museum Chongzuo Shi Chongzuo zhirendong human remains Chongzuo Zhuang Nationality Museum Chong’an Temple Chonin Chonwu city Choo choose

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