telephone switching system
短语词组
- automatic telephone switching system 自动电话交换系统;自动
- manual telephone switching system 人工电话交换机
- Public Telephone Switching System 交换机
- mobile telephone switching system 移动电话交换机
- toll telephone switching system 长途电话交换机;长话交换机
- local telephone switching system 市内电话交换机;地区电话交换机
- STEP TELEPHONE SWITCHING SYSTEM 步进制电话交换机
- SOHO TELEPHONE SWITCHING SYSTEM 求电话交换机 返回 telephone switching system