Summer use of water (water-cooled unit of cooling water, domestic wastewater) as a source of heat in winter the use of water (domestic wastewater, wastewater pools sauna) or air as a source of heat;
夏季采用水（水冷机组的冷却水，生活废水）作为热源，冬季采用水（生活废水、泳池桑拿废水）或空气作为热源；
Summer use of water (water-cooled unit of cooling water, domestic wastewater) as a source of heat in winter the use of water (domestic wastewater, wastewater pools sauna) or air as a source of heat;
夏季采用水（水冷机组的冷却水，生活废水）作为热源，冬季采用水（生活废水、泳池桑拿废水）或空气作为热源；
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