The paper analyzed the air conditioning stystem, cooling source and building ventilation, and revealed some questions existing in HV&AC, then brought forward corresponding measures.
本文通过对空调、建筑通风、空调冷源的分析，揭示了它们在呼吸道传染病爆发时存在的问题并提出了相应的解决措施。
Brushless DC cooling fans, AC cooling fans and other appropriative fans, for example: cars, refrigerators, air-conditions and the medical mechanism etc.
直流无刷散热风扇，交流散热风扇及其它行业如汽车冰箱、空调、机械医疗设备等专用风扇。
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