| 1. | 24 - key display speakerphone 12 - key standard phone 24 -键显示屏免提对讲电话 |
| 2. | 16 - key display speakerphone 8 - key standard phone 16键免提对讲显示屏电话 |
| 3. | Key display phone 10 - key standard phone 10键显示屏免提对讲电话 |
| 4. | Roles of the standards bodies , key standards , and architectures 标准组织、关键标准和体系结构的角色 |
| 5. | 24 - key display speakerphone 12 - key display speakerphone 8 - key standard phone 24键免提对讲显示屏电话 |
| 6. | 24 - key standard speakerphone 24键标准电话 |
| 7. | 18 - key standard phone 18 -键标准电话 |
| 8. | 20 - key standard phone 20键标准电话 |
| 9. | 10 - key standard phone 10键标准电话 |
| 10. | 24 - key standard phone 24键标准电话 |