“density metrology”的概念、定义、翻译、参考文献-科学参考

单词	density metrology
释义	density metrology Encyclopedia 工学密度计量释 density metrology密度计量对密度这一物理量所开展的计量活动。密度是表征物质内在特性的一个物理量，表示单位体积中所含有物质的质量，国际单位制中的单位为千克/米3。
随便看	real projective plane real projective space real property real property survey real quadratic field real quadratic form real quaternion real random variable real-rank real representation real right granted by way of security real right law Real Right Law of the People's Republic of China real root real rotation group real saving Real scene real school real self Real Semantics real sequence real series real simply connected analytic Lie group real singularity real solution

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