secondary ratio

基本解释

The experimental results show that with the increase of secondary air ratio, the emissions of NO reduce, while the excess air coefficient remains unchanged.
试验结果表明：在空气过剩系数保持不变的条件下，随着二次风率的增加，烟气中NO的排放浓度减小；
Note that since they are transformers, they can also provide resistive source-to-load impedance matching by selection of appropriate primary/secondary turns ratio.
注意，由于它们是变压器，它们也可以通过选择合适的主/次级匝数比提供电阻的源到负载阻抗匹配。
An industrial experiment were conducted to test the influence of excess air coefficient and secondary air ratio on the carbon content of fly ash of CFB boiler burning Fujian anthracite.
在工业热态CFB锅炉上测试了过量空气系数和二次风率变化对锅炉飞灰含碳量的影响。

The prospects for girls have been improving in other regions such as East Asia and the Pacific, where the lower secondary gross enrolment ratio for girls grew from 75% to 91% between 1999 and 2009.
UNESCO: World Water Assessment Programme (WWAP)
Significant improvements have also been made in the Arab States, with the female gross enrolment ratio for lower secondary education rising from 67% to 82% over the same period.
UNESCO: World Water Assessment Programme (WWAP)
In sub-Saharan Africa, the gross enrolment ratio for girls in lower secondary education is 39% compared to 48% for boys.
UNESCO: World Water Assessment Programme (WWAP)