整流器；整流管一种将交流电流转化为直流电流的装置，如二极管。
A device, such as a diode, that converts alternating current to direct current.
该装置采用低廉ccd摄像机，配以可见和红外发光二极管组成。
The device used the cheap CCD camera and visible light led and infrared ray led.
该装置采用低廉ccd摄像机，配以可见和红外发光二极管组成。
The device used the cheap CCD camera and visible light led and infrared ray led.
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