The bathroom is ventilated by means of an extractor fan.
这个浴室使用抽风扇通风。
Demonstrate the function of optimization on choosing the main fan in ventilated system through the analysis of true examples.
以实例分析优化主扇机选择在通风系统工程中的作用。
Choosing main fan in mine is according to the amount of wind that the mine well needs and the well ventilated resistance.
选择矿井主扇机，需依据矿井所需风量、通风阻力。
Choosing main fan in mine is according to the amount of wind that the mine well needs and the well ventilated resistance.
选择矿井主扇机，需依据矿井所需风量、通风阻力。
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