By developing new input air effect, removing and controlling internal source of pollution, we can improve IAQ.
通过发挥新风效应、消除和控制室内污染源等方法可以改善室内空气品质。
The motive source of traditional lawn mower is internal combustion engine, it result in noise pollution, exist the energy problem and exhaust problem, and increase the pressure of energy.
传统草坪机一般使用内燃机作为动力源，造成了噪音污染，而且还存在能源和排放问题，增加了能源压力。
The motive source of traditional lawn mower is internal combustion engine, it result in noise pollution, exist the energy problem and exhaust problem, and increase the pressure of energy.
传统草坪机一般使用内燃机作为动力源，造成了噪音污染，而且还存在能源和排放问题，增加了能源压力。
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