“national prototype of the kilogram”的概念、定义、翻译、参考文献-科学参考

单词	national prototype of the kilogram
释义	national prototype of the kilogram Encyclopedia 工学质量计量技术释 national prototype of the kilogram1千克质量基准砝码中国在1965年从国际计量局得到砝码器号是60号的国家千克原器。
随便看	nuclear burning nuclear C* algebra nuclear C*-algebra nuclear charge nuclear charge number nuclear charge radius nuclear,chemical and biological attack nuclear chemical engineering nuclear chemistry nuclear chemistry exploration nuclear class nuclear cloud nuclear compartment nuclear composition nuclear condensation growth model nuclear-condensation-growth model nuclear constant nuclear cooling nuclear core nuclear cosmochemistry nuclear counting system nuclear criticality safety nuclear cruise missile nuclear-cytoplasmic hybrid cell nuclear-cytoplasmic ratio

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