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| 发信号: 308 phrases in 25 subjects |
| Astronautics | 2 |
| Automobiles | 1 |
| Aviation | 6 |
| Biology | 2 |
| Electric machinery | 1 |
| Electrical engineering | 1 |
| Electricity | 1 |
| Electronics | 20 |
| Energy industry | 1 |
| General | 83 |
| Household appliances | 1 |
| Information technology | 2 |
| International Monetary Fund | 2 |
| Mathematics | 2 |
| Metrology | 1 |
| Military | 17 |
| Missiles | 2 |
| Nautical | 6 |
| Oil and gas | 1 |
| Oil processing plants | 5 |
| Photography | 1 |
| Radio | 8 |
| Rail transport | 4 |
| Technology | 137 |
| Telecommunications | 1 |
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