“primary standard of length”的概念、定义、翻译、参考文献-科学参考

单词	primary standard of length
释义	primary standard of length Encyclopedia 工学米定义释 primary standard of length长度计量基准以现代科学技术所能达到的最高准确度保存和复现长度单位“米”的整套装备。
随便看	rang finder Ranghulu Qu ranging ranging error ranging pole ranging sonar Rango rangooncreeper fruit Rangoon River Rangpur Rangtang Xian rangu ranibizumab Ranieri de Calzabigi Ranis-Fei model rank rank analysis rank-based tributory system rank classification rank classification of water resources and hydropower projects rank correlation rank correlation analysis rank correlation coefficient rank correlation coefficients rank correlation method

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