| 1. | Dc system design code for small electric power project 小型电力工程直流系统设计规程 |
| 2. | Technical code for designing dc system of power projects 电力工程直流系统设计技术规程 |
| 3. | Detriment analysis on dc system grounding and it ' s treatment 直流系统接地的危害分析与处理 |
| 4. | The study of numerical method in extra high voltage dc system 超高压直流系统数值计算新方法 |
| 5. | Unit is designed for negative ground 12 v dc systems only 本机仅用于负极接地的12v直流系统 |
| 6. | Desinging of direct current power system in electrical power engineering 电力工程直流系统设计 |
| 7. | The develop of in sulation monitor on dc system by magnetic modulation 磁调制式直流系统绝缘检测装置的研制 |
| 8. | Protection against corrosion by stray current from direct current systems 直流系统中杂散电流引起腐蚀的防护 |
| 9. | Protection against corrosion by stray current from direct current systems 直流系统中杂散电流引起腐蚀的防护 |
| 10. | Artificial pollution tests on high - voltage insulators to be used on d . c . systems 用在直流系统的高压绝缘子的人工污染试验 |