The outstanding features of this plan lie in the programmable modulate mode, modulate rate, IF rate and so on.
该方案的显著特点是：调制方式、调制速率、中频频率皆可编程设置。
A pressure controller is employed to modulate speed of regulating pressure fan in a PID control mode.
利用一个压力控制器，采用PID控制方法对调压风机进行变频控制。
Conveyer's speed may dispose the control mode which the constant speed or may modulate velocity.
输送机的速度可配置成定速或可调速的控制方式。
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