1)  number concentration distribution
数浓度谱
2)  number size distribution
数浓度谱分布
3)  number concentration
数浓度
1.
Analysis of aerosol number concentration and mass concentration using APS;
利用APS分析大气气溶胶数浓度和质量浓度
2.
Measurements of exhaust particle number concentration and size distribution of a gasoline engine were conducted.
对汽油机排气中颗粒的数浓度和粒径分布特征进行了测试。
3.
The particle number concentration was quite high relatively in this region, reaching 104/ cm3, in which, ultra fine particles (size 0.
结果表明,该地区大气细颗粒物数浓度比较高,达104个/cm3,其中超细粒子(粒径0。
4)  number concentration
个数浓度
1.
The observation of particle number concentration and size distribution has been conducted for two weeks in may of 2006 in the downtown Ji'nan.
5个数浓度中所占比例较大,达到95%。
5)  particle number concentration
计数浓度
1.
Analyses the particle number concentrations of atmospheric particles for 132 areas in China.
分析了我国132个地区大气尘计数浓度的检测结果,发现我国大气尘浓度分布规律没有明显变化,指数仍为2。
2.
Reports the particle number concentrations of atmospheric particles for 132 areas including all provinces except Hong Kong,Macao and Taiwan in China.
介绍了近年来对涵盖我国各省区(港、澳、台除外)132个地区大气尘计数浓度的测定数据,结果表明除一例外浓度均在30万粒/L以下,比20余年前明显降低。
6)  Number concentra-tion
粒数浓度
参考词条
补充资料：粒子数浓度
分子式：
分子量：
CAS号：

性质：符号为C。分子B的分子数浓度C（B）定义为B分子数N（B）除以混相体积。其SI单位为米-3，也用升-1。有时也用个/米3或个/升。参见含量和成分的表达。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。