adj.闭路式的。circuit, closed: 闭合电路closed circuit: 【无线电】闭路式(电视)。 blocking relay for closed circuit: 合闸闭锁继电器cc closed circuit: 闭合电路cctv closed circuit television: 闭路电视,工业电视下载手机词典可随时随地查词查翻译