管道照射 (Irradiation of return air ducts) thereby disinfecting air before it is recirculated.
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管道照射
Pipeline irradiation
以上为机器翻译结果，长、整句建议使用 人工翻译 。
阳光照射管阵时，管道里的液体会被加热沸腾，在日常情况下，液体会流进热泵并传导热能。
When sunlight hits the tubes the liquid within becomes superheated. In a home situation, it would then flow into a heat pump to transfer that heat.
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