manual telephone system
短语词组
- manual l telephone system 人工电话系统
- manual mobile telephone system [通信]移动式人工电话系统
- manual telephone switching system 人工电话交换机
- manual telephone exchanging system 人工电话交换制
- manual telephone exchange system 人工电话交换制
- telephone system manual 人工电话系统 返回 manual telephone system