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双图像传送设备就是用一条视频线路传送2路图像信号作为目的的设备。这对于发送图像信号线路少的情况(特别是通过电波传送的情况)、卫星中继线路费用高的情况,是相当有用的设备。
Dual image transmission device is to use a video line to send 2-way image signal as the purpose of the device. This is a very useful device for situations in which the number of video signal lines to be transmitted is small (especially when transmitted by radio waves) and the cost of satellite trunks is high.