closed circuit []

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There's a closed-circuit television camera in the reception area. 接待处有一个闭路电视摄像头。来自柯林斯例句
The plant is operated entirely by remote control and monitored by closed circuit television or periscope. 这个工厂完全用遥控操作,而且用封闭电路电视或展望镜来监视. 来自辞典例句

closed circuit []

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