在此过程中，采用变频器调速控制风机转速。
In this process, using the frequency changer to control the fans 'rotational speed.
分析了矿井局部通风机自动控制的必要性，并提出自调整模糊控制调节通风机转速方案。
The necessity of mine local ventilator auto control is analysed, a kind of method of self-adjusting fuzzy control in mine local ventilator is proposed.
PF系列棉花测产系统是由产量监视器、棉花流量传感器、割台高度传感器、地运传感器、风机转速传感器、GPS接收机和其它配件组成。
PF cotton yield monitoring system is consisted of a yield monitor, cotton flow sensor, head height sensor, ground speed sensor, fan speed sensor. GPS receiver and other components.
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