| 1. | E intercom system : 50 interphone units all over the plant
对讲系统：全厂50只对讲机。 |
| 2. | Black - white video doorphone system
黑白可视对讲系统 |
| 3. | Application of dtmf communication in the intelligence visible - speaking system
通信在智能可视对讲系统中的应用 |
| 4. | Telephone entry doorphone system
大门电话对讲系统 |
| 5. | The district allocate pipeline pure water , can look at system of talkbacking
小区配备管道纯净水，可视对讲系统。 |
| 6. | Talk - back control panel
对讲系统控制板 |
| 7. | Automated teller systems
自动对讲系统 |
| 8. | General specifications of building intercom system and elec - control anti - burglary door
楼寓对讲系统及电控防盗门通用技术条件 |
| 9. | Telephone entry system
电话对讲系统 |
| 10. | Loudspeaker systems have even preempted the paging and message - service roles of the department
对讲系统甚至已经替代了呼叫和留言服务。 |
