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