| 1. | Design and implementation of digital multiplex system with fpga 的数字复接系统的设计与实现 |
| 2. | Digital multiplex hierarchy 数字复接体系 |
| 3. | Digital multiplex equipment 数字复用设备 |
| 4. | Performance and test methods of the second order digital multiplex equipment operating at 8448 kbit s and using positive justification 8448 kbit s正码速调整二次群数字复用设备技术要求和测试方法 |
| 5. | Performance and test methods of the fourth order digital multiplex equimpent operating at 139264 kbit s and using positive justification 139264 kbit s正码速调整四次群数字复用设备技术要求和测试方法 |