请输入您要查询的字词:
单词
national time scale primary standard
释义
national time scale primary standard
Encyclopedia
工学
时标
释
national time scale primary standard
原子时标国家计量基准
1983年经国家质量监督检验检疫总局批准,由中国计量科学研究院(NIM)国家时间频率计量中心建立和保持的原子时标UTC(NIM)。是统一全国时间频率量值的最高依据。
随便看
primary and secondary
primary and secondary equilibrium
primary and secondary school buildings
primary and secondary school teacher employment system
primary and secondary school teacher flow system
primary and secondary school teachers' training system
primary antenna
Primary Atmosphere hypothesis
primary auditory cortex
primary basin
primary battery
primary B cell deficiency
primary beam
primary biliary cirrhosis
primary body
primary bronchopulonary carcinoma
primary bronchus
primary cell
primary cell culture
primary cells control
primary cell wall
primary cementing
primary central nervous system lymphoma
primary cerebral vesicle
primary ciliary dyskinesia
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2025/7/26 16:26:43