| 1. | Replacement of pabx system at wu chung house
更换胡忠大厦的专用自动电话交换系统 |
| 2. | A local information , pay - per - call phone exchange
本地信息，按电话付费的电话交换。 |
| 3. | There are almost 1 0 million telephone exchange lines
全市差不多有1000万条电话交换线 |
| 4. | Technical requirements for toll manual switching equipment
长途人工电话交换设备.技术要求 |
| 5. | A . b . strowger invents the telephone switch , dial telephone
史端乔发明自动电话交换系统。 |
| 6. | The supplementary specification to spc
电话交换设备总技术规范补充件1 |
| 7. | Methods of test for toll manual telephone switching equipment
长途人工电话交换设备.测试方法 |
| 8. | - it ' s the town ' s old phone switchboard
这是镇里旧的电话交换总机 |
| 9. | It ' s the town ' s old phone switchboard
这是镇里旧的电话交换总机 |
| 10. | Pstn public switched telephone network
公共电话交换网 |
