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| биение частоты | |||
| 差频差频: 122 phrases in 12 subjects |
| Acoustics | 2 |
| Astronautics | 2 |
| Chemistry | 1 |
| Electric machinery | 1 |
| Electronics | 23 |
| General | 17 |
| Microelectronics | 1 |
| Military | 7 |
| Oil processing plants | 1 |
| Radio | 5 |
| Technology | 61 |
| Telecommunications | 1 |
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