closed circuit signalling
... closed circuit signaling 闭路信号发送 closed circuit signalling 闭路通信 closed circuit working 闭路工作 ...
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闭路通信系统 [通信] closed circuit communication system ; closed-circuit communications system
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有数拍字节的通信数据和闭路电视数据需要处理。
There’ll be petabytes of traffic data and CCTV data.
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