A network digital surveillance system is designed in this paper according to the practical requirement of oil refinery and on the bases of the closed circuit television surveillance system before.(根據煉油廠的實際需求，設計出一套適合煉油廠生產現場的網絡數字監控系統。)

This paper analyzes reason of measure waveform produce error in decode circuit, put forward experiment means of adopt closed circuit television system transmit signal.(分析了在解碼電路實驗中，測量波形產生誤差的原因，提出了采用有線電視系統傳送信號的實驗方法。)

For example, Britain, said a police spokesman in widely installed closed-circuit television system, crime fell to 1 million or so.(例如，英國警方發言人說，在廣泛安裝閉路電視系統以后，犯罪案件下降到1萬起左右。)

Researchers observed the children via closed-circuit television and recorded their activities.(研究者通過閉路電視觀察孩子們的行為。)

IDD phones in bars and restaurants; closed-circuit television and mini bar. 24-hour room service provides you with comfortable and neat environment for rest.(酒吧和餐廳內國際直播電話；閉路電視及迷你冰箱一應俱全。24小時的客房服務為您提供整潔舒適的休息環境。)

There's a closed-circuit television camera in the reception area.(接待處有一臺閉路電視攝像機。)

Village every building entrance, elevator lobbies main public areas are closed-circuit television, camera systems and warning systems.(村內每一座大樓的出入口、電梯大堂等主要公共區域設有閉路電視、攝像系統及報警系統。)

IP cameras are most often used for IP surveillance, a digitized and networked version of closed-circuit television (CCTV).(IP攝像機通常用于IP監測、數字化和網絡化的版本的閉路電視(CCTV)。)

The cable is used as receiving foedrer of television closed circuit transmission cable and community television singal distribution coaxial cable .(適用于作廣播電視接受饋線，閉路電視傳輸線以及公用電視天線系統分配同軸電纜。)

On a typical day in a big city you may be filmed by hundreds of closed-circuit television (CCTV) cameras.(在一所大城市里的一天，你可能已被閉路電視（CCTV）攝像頭記錄了上千次。)