| |||
| 频率分析器 | |||
| 频率分析仪 | |||
|
frequency analyzer : 45 phrases in 11 subjects |
| Air defense | 4 |
| Aviation | 3 |
| Earth sciences | 1 |
| Electronics | 14 |
| General | 1 |
| Geophysics | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 1 |
| Refrigeration | 1 |
| Space | 2 |
| Technology | 16 |
| |||
| 频率分析器 | |||
| 频率分析仪 | |||
|
frequency analyzer : 45 phrases in 11 subjects |
| Air defense | 4 |
| Aviation | 3 |
| Earth sciences | 1 |
| Electronics | 14 |
| General | 1 |
| Geophysics | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 1 |
| Refrigeration | 1 |
| Space | 2 |
| Technology | 16 |