设计除尘烟道及沉降室，保证排放降低，达到国家二级标准以上。
Removing dust tunnel and deposition room are designed to guarantee the emissions of reducing and meet the national standards of more than level 2.
2002年至2004年，钦州市区环境空气质量达国家二级标准。
From 2002 to 2004, the quality of ambient air in urban area of Qinzhou city reach national secondary standard.
2004年，受监测的342个城市中有210个城市的空气质量超过了国家环境空气质量标准的二级标准。
In 2004, 210 cities exceeded the Class 2 limit values of the National Ambient Air Quality Standard (NAAQS) within the total 342 monitored cities.
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