“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	Chau Chak Wing Museum Chaudhuri Chaumont Graphic Design Biennial Chaumuhtao Chauncy Dennison Harris Chautauqua Movement Chauvenet Chauvenet crater Chauvenet criterion for rejection Chauvet-Pont-d'Arc Cave chauvinism Chavín Civilization Chaweng Poems Chawuhu Tomb Group Chayangzong Rongdong Chayi costume of Chinese opera chayote Cha’ersen Reservoir Ch. Biligsaihan C-H bond activation reaction CH bond activation reaction Ch.Chimed CHCS CH Cygni CHD

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