| 释义 |
primary standard短语¹⁴⁴⁹⁷²⁺²
基本例句
原始标准,基准物,原标准器
The national primary standard of combustion heat was completely improved.
对国家燃烧热基准进行了全面改造。 cnki
This paper will introduce the improvement of national primary standard for low pressure, middle pressure and high pressure, and the development of dynamic pressure calibration technology in China.
本文介绍了我国微压、中压和高压方面国家基准的改进和我国动态压力校淮技术的进展情况。 cnki |