“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	filter flask filter function filtergram filtering filtering enhancement filtering-off filtering operator filtering theory filter IR interference-absorption type filter knob filter loaded wideband output circuit filter loss filter mass method filter material for dust removal filter membrane filter method filter methods filter of a lattice filter of sets filter paper filter passband filter photography filter photometry filter press filter process control systems

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