 |
| hélice: 293 phrases in 20 subjects |
| Agriculture | 42 |
| Astronautics | 15 |
| Chemistry | 2 |
| Communications | 4 |
| Earth sciences | 12 |
| Electric traction | 1 |
| Electricity generation | 1 |
| Electronics | 7 |
| Energy industry | 2 |
| General | 4 |
| Health care | 2 |
| Industry | 8 |
| Information technology | 1 |
| Mechanic engineering | 62 |
| Medical | 4 |
| Metallurgy | 1 |
| Natural sciences | 4 |
| Technology | 1 |
| Telegraphy | 1 |
| Transport | 119 |