The harm and source of SO2 in indoor air are introduced.
作者介绍室内空气中SO2的危害与来源。
The heat source and type of heat-harm should be investigated before controlling it.
治理热害应首先探明热源，然后根据热害类型及程度进行综合治理。
The heat source and type of heat-harm should be investigated before controlling it.
治理热害应首先探明热源，然后根据热害类型及程度进行综合治理。
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