 |
| |||
| frequency translator; frequency changer | |||
| frequency converter; frequency transformer | |||
| 频率转换器: 32 phrases in 11 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Aviation | 2 |
| Computer networks | 1 |
| Electronics | 19 |
| Geophysics | 1 |
| Information technology | 2 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Space | 2 |
| Technology | 1 |