1.
Compressed air for general use-Quality classes
GB/T13277-1991一般用压缩空气质量等级
2.
As to the air quality, the number of days with air quality recorded above Grade II totalled299 last year, two days less than that of the previous year.
在空气质量方面，全年空气质量等级达到二级以上的天数为299天，比前年减少两天。
3.
Urban Air Quality in Key Environmental Protection Cities In the 47 key environmental protection cities, 19 of them have attained the Grade II standards for urban air quality.
环保重点城市空气质量47个环保重点城市中，19个城市环境空气质量达到空气质量二级标准。
4.
Percentage of the Air Quality Grades in 341 Cities in 2001
2001年度全国341个城市空气质量分级比例
5.
The air quality in 113 was worse than Grade III, accounting for 33.2%.
113个城市空气质量劣于三级，占统计城市数的33.2%。
6.
Investigation and Analysis on Indoor Air Quality in Star Hotel Room;
星级宾馆客房室内空气卫生质量调查分析
7.
Application of the Index Model in Evaluation of Indoor Air Quality
分级型指数模式在室内空气质量评价中的应用
8.
Application of BP neural network model on air quality rank appraisal
BP神经网络模型在空气质量级别评价中的应用
9.
Haikou has attained Grade I while 14 of them attained Grade III.
其中海口达到一级标准。 14个城市空气质量为三级。
10.
judging on a scale of 1 to 10.
质量标准分为10个等级。
11.
Spatial analysis on grade evaluation of land quality geochemistry in Dingshu of Yixing
宜兴丁蜀镇土地质量地球化学等级评价中的空间分析
12.
From 2002 to 2004, the quality of ambient air in urban area of Qinzhou city reach national secondary standard.
2002年至2004年，钦州市区环境空气质量达国家二级标准。
13.
Regional Air Quality Ranking Techniques of the Pearl River Delta(Guangdong-Hongkong) and the Related Study of the Information Releasing Methods
粤港珠江三角洲区域空气质量分级技术及信息发布方法研究
14.
capable of being graded (for quality or rank or size etc.).
能够分出等级（对质量、等级或者尺寸大小等）。
15.
Air quality--Vocabulary
GB/T6919-1986空气质量词汇
16.
d emission standard
空气质量和排放标准
17.
multiparameter air quality analyzer
多参数空气质量分析仪
18.
ambient air quality standard
GB3095-1996环境空气质量标准