closed circuit communication system

英 [kləʊzd ˈsɜːkɪt kəˌmjuːnɪˈkeɪʃn ˈsɪstəm] 美 [kloʊzd ˈsɜːrkɪt kəˌmjuːnɪˈkeɪʃn ˈsɪstəm]
closed circuit communication system
网络  闭路通讯系统; 闭路通信系统