closed circuit system 闭路系统

closed circuit TV system 闭路电视系统

closed-circuit television system 闭路电视系统 ; 闭路监控电视系统

semi-closed circuit system 半封闭式回路系统

closed circuit communication system [通信] 闭路通信系统 ; 闭路通讯系统

closed-circuit oil system 闭路循环油系统

closed-circuit communications system 闭路通信系统

closed circuit oxygen system 闭式回路供氧系统

closed circuit telegraph system 闭路电报系统

closed circuit hydraulic system [机] 闭式循环液压系统