“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	deep cooling/cryogenice Deep Courtyard deep-depletion CCD deep donor level deep-draft pillar type platform deep-dyeable polyester fiber deep dyslexia Deep Earth Exploration Project in China (SinoProbe) deep earthquake deep ecology deepening borehole detection deepening education deepening speed of mining project deep eutectic solvent deep exploration methods deepfade Deep Feeling of Flowers and Willows Deep fertilization deep-field observation deep fissure deep focus deep focus earthquake deep-focus earthquake deep focus shock deep foundation

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