“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	Kepler folium Keplerian disk Keplerian motion Keplerian orbit Keplerian region Keplerian rotation Keplerian shear Keplerian speed Keplerian telescope Keplerian velocity Kepler law Kepler laws Kepler mission Kepler monster Kepler motion Kepler orbit Kepler orbital elements Kepler potential Kepler problem Kepler's constant Kepler's disk Kepler second law Kepler's equation Kepler's first law Kepler's law

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