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closed-circuit television

noun
/ˌkləʊzd ˌsɜːkɪt ˈtelɪvɪʒn/
/ˌkləʊzd ˌsɜːrkɪt ˈtelɪvɪʒn/
 [uncountable]
(abbreviation CCTV)
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  1. a television system that works within a limited area, for example a public building, especially to protect it from crime闭路电视Topics Crime and punishmentc2
    Oxford Collocations DictionaryClosed-circuit television is used before these nouns:
    • surveillance
    See full entry

See also: closed-circuit television

closed-circuit television
Systems for broadcasting television and radio: AM, cable, cable television...

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