closed circuit television造句

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.

Researchers observed the children via closed - circuit television and recorded their activities.
研究者通过闭路电视观察孩子们的行为.

Double password lock, closed - circuit television surveillance systems, video intercom system.
双重密码门锁, 闭路电视 监视系统, 可视对讲系统.

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