目的：构建西门子实验室自动化系统实时双向通讯功能。
Objective To implement a real-time bidirectional communication function on Siemens StreamLab laboratory automation system.
局、矿远程图形、图象实时双向传输需要宽频带的传输信道，光纤光缆信道是理想的选择。
Optic cable is ideal when wide band transmission channel is required to implement realtime dual transmission of bureau, mine remote picture and image.
可视电话就是一种点到点的多媒体通信平台，它能实时双向传输通话双方的图像和语音信号。
Viewphone is a kind of video communication terminal that base on point to point, it makes use of current telephone network to transmit real-time bi-directional video and audio.
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