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Terms containing 国家环境空气质量标准 | all forms | in specified order only
SubjectChineseEnglish
tech.国家一级环境空气质量标准national primary ambient quality standard
ecol.国家一级环境空气质量标准national primary ambient air quality standard
ecol.国家二级环境空气质量标准national secondary ambient air quality standard
wind.国家环境空气质量标准national ambient air quality standard
environ.美国国家环境空气质量标准National Ambient Air Quality Standards

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