中央空调通风系统送风中的污染物是室内空气的主要污染源之一，主要的污染物是可吸入颗粒物和微生物。
The contamination in the central air conditioning duct system is the one of the principal contamination of the indoor air, it include inhalable particle and microorganism.
电机带动送风腔中的风轮转动，吸入空气并送出冷风；
Motor drives wheel on wind cavity to suck air and blow cold air.
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