“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	alloy alloyage alloy anode material alloybath alloy catalyst alloyed white cast iron alloy electrocatalyst alloy for magnetic temperature compensation alloying alloy junction technique alloy magnetic particle tape alloy materials of precious metals alloy phase diagrams alloy phases alloy powder alloy steels alloy structure alloy with high excursion range of induction allozyme all-pairs shortest path all pass filter all-pass filter all pass optical filter all-pass optical filter All People Congress

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。