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为了摸清家用煤对住宅空气的污染,为改善住宅环境提供依据,进行了本调查。 调查以A、B两种不同类型住宅为对象(见图)。以SO_2和NO_x为监测指标。样品统一
In order to find out the domestic coal pollution of residential air, to provide a basis for improving the residential environment, conducted the survey. Survey to A, B two different types of housing for the object (see photo). SO_2 and NO_x as monitoring indicators. Sample uniform