“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	radio compass system radiocontamination radio continuum radio contour radio core radio corona Radio Correlator radio counterpart Radio DDR radio depth radiodermatitis radio determination satellite service,RDSS radiodiagnosis radio diameter radio direction finding radio dish radio disk radio disk temperature radio Doppler effect radio dosimeter radio double source radio early-type emission-line star radio echo radio echo method radio eclipse

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。