1.
The NO2 concentration in Guangzhou, Beijing and Shanghai was comparatively fairly high.
广州、北京、上海等特大城市，二氧化氮浓度相对较高。
2.
Research on NO_2 Concentrations Control and Ventilation Plan for Urban Highway Tunnel
城市公路隧道二氧化氮浓度控制及通风方案研究
3.
In 2001, the annual average of NO2 concentration in the air of 341 cities attained the Grade II national standards for air quality.
2001年，341个城市空气中二氧化氮浓度年均值均达到国家环境空气质量二级标准。
4.
Analysis on the changes of blood NO,MDA and SOD in pneumoconiosis patients
尘肺患者血中一氧化氮、丙二醛、超氧化物歧化酶浓度变化的研究
5.
The concentrations of nitrogen dioxide and ozone also exceed the objectives for a few days in a year.
二氧化氮及臭氧的浓度，每年也有几天超出了空气质素指标。
6.
The Development of a Monitor for UDMH and Nitrogen Dioxide of High Concentration in Air
空气中高浓度偏二甲肼和二氧化氮监测仪的研制
7.
stationary source emissions-determination of the mass concentration of nitrogen oxides (naphthylethylenediamine photometric method)
固定源辐射-氮氧化合物质量浓度的测定-萘二胺光度测定法
8.
CO2 conent sender
二氧化碳浓度发送器
9.
determination of mass concentration of nitrogen dioxide(modified griess-saltzman method)
二氧化氮含量浓度的测定-改进的格里斯-萨尔茨曼(griess-saltzman)法
10.
The Industrial Study on the Removal of High Concentration Ammonia Nitrogen from the Vanadium Sesquioxide Wastewater;
三氧化二钒生产废水中高浓度氨氮脱除的工业性研究
11.
determination of the mass concentration of nitrogen oxides (chemiluminescence method)
氧化氮含量浓度的测定-化学发光法
12.
Experimental Study on the ANAMMOX Process under the Low Concentration of Ammonia;
低浓度氨氮条件下厌氧氨氧化工艺试验研究
13.
Study on Application of ANAMMOX Reactor under low ammonia concentration
厌氧氨氧化在低氨氮浓度下的应用研究
14.
Observations do not indicate that cloud nucleus concentrations parallel those of sulphur dioxide.
观测没有表明云核浓度与二氧化硫浓度相关。
15.
Variation of nitrogen monoxidum concentration in patients with glomerular diseases
肾小球疾病患者血浆一氧化氮浓度变化的意义
16.
The Purification of Low Concentration NOx in Cultural Relics Conservation Micro-Environment by Biomass-based Carbon
竹炭净化文物保存微环境空气低浓度氮氧化物
17.
The Intermittent and High Concentration NOX Exhaust Gas Disposal Technology
间歇式高浓度氮氧化物废气的治理技术
18.
Study on Oxidation of Organic Compound Containing Nitrogen in Supercritical Water;
超临界水氧化高浓度含氮有机废水研究