“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	soil mineral soil mineral colloid soil mineral interlayer expansion soil mineral particle soil mixing wall method soil moisture soil moisture acquisition Soil Moisture and Ocean Salinity satellite soil moisture conservation soil moisture conservation in dryland soil moisture conservation in farmland soil moisture constants soil moisture content soil moisture forecasting soil moisture for grassland soil moisture investigation soil moisture-monitoring instrument soil moisture monitoring instruments soil moisture monitoring station soil moisture movement for irrigated grassland soil moisture observation soil moisture regimes soil moisture retaining soil moisture tension soil monitoring

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