“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	circle quadrature circle radial curve circle reading circle right circles-and-squares fractal circle scanner circle-sector land use model circle segment triangle circles preserving property circles-preserving property circle squaring circle stage circle strophoid circlet circle tangent line circle theorem Circlet of Pisces circle transformation circle triangle picking circlip circRNA circuit circuit algorithm circuital theorem of electrostatic field circuit analysis

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。