System is two-way much way transmission system, should to receive the signal of videos from the end transmit, and also convey control signal and power to the camera.
系统是双向的多路传输系统，既要向接收端传输视频信号，又要向摄像机传送控制信号和电源。
System is two-way much way transmission system, should to receive the signal of videos from the end transmit, and also convey control signal and power to the camera.
系统是双向的多路传输系统，既要向接收端传输视频信号，又要向摄像机传送控制信号和电源。
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