| 1. | Speed regulating of gear wheel rigs by frequency conversion 牙轮钻机变频调速 |
| 2. | The frequency conversion regulation of the condensate pump 凝结水泵变频调节 |
| 3. | Study on frequency conversion problem in storm sampling 暴雨选样间的频率转换问题探讨 |
| 4. | 4 . the application of frequency conversion technology 四变频技术的应用。 |
| 5. | Main electromotor adopt import frequency conversion tecnical 主电机采用进口变频技术。 |
| 6. | The measuring method of frequency conversion singals 变频信号的测量方法 |
| 7. | Application of frequency conversion timing of air compressors 空气压缩机的变频调速及应用 |
| 8. | Frequency conversion control of master pump motor 主泵马达变频控制。 |
| 9. | Frequency conversion transformation of air compressor 空压机变频改造 |
| 10. | The main pump uses frequency conversion control 主泵采用变频控制。 |