... 中频控制 Middle Frequency Control 低频控制 Low Frequency Control 推杆前/推杆后控制 Pre/Post Selector ...
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Low Frequency Control Devices 低压变频控制设备
low frequency PWM control 低频PWM控制
By comparing with the existing method with time-domain analysis three algorithms discussed in this paper are predominant in qualities. The algorithms can give effectively judgment for the track circuit FSK and low frequency control signal.
三种算法都解调出轨道电路移频信号和低频控制信号的频率，与以前的时域分析法相比，有了质的提高，能有效的判别轨道电路移频信号的频率与低频控制信号。
参考来源 - 轨道移频信号特征频率提取·2,447,543篇论文数据，部分数据来源于NoteExpress
Starting with your eq flat, remove ALL be bottom end by turning the low frequency control to full cut.
在开始得时候，让你得EQ保持平治(归零)，然后对低频做低切。
High Mid and low Mid dials (blue) are each paired with a freq control (lighter blue) that allows you to select the frequency boosted or cut.
低中高表盘(蓝色)与一个引入FREQ控制(淡蓝色每个配对)，允许你选择的频率提高或降低。
The current measurement and control system in a Low-frequency Magnetic Field is a comprehensive system of hardware and software, including two parts: current measurement and computer control.
低频电磁场电流测控系统包括电流测试和输出控制两个部分，由软件和硬件相互配合组成一个完整的计算机控制系统。
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