The material surface image screened by a CCD camera was processed to calculate the level of material by a computer, and then to control the valve of material container.

由CCD摄像头拍摄容器内物料表面图象，经计算机处理后得到物位高度，进而控制物料容器的供料阀门。

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When they are put into a simple container, a tiny web camera watches their actions.

它们被放入一个普通的容器，一台小型网络相机会观察它们的反应。

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In Wednesday's scenario, CNN's John King had jumped out early around lunchtime, saying that a department store's surveillance camera had helped law enforcement spot a person dropping a container on the street that was believed to be the second of two bombs that detonated near the race's finish line.

NPR: Media Frenzy On Marathon Investigation