 |
| hélice: 554 phrases in 42 subjects |
| Agriculture | 41 |
| Antennas and waveguides | 1 |
| Astronautics | 1 |
| Aviation | 5 |
| Botany | 2 |
| Chemistry | 5 |
| Coal | 1 |
| Communications | 11 |
| Construction | 16 |
| Earth sciences | 16 |
| Electric traction | 1 |
| Electricity generation | 1 |
| Electronics | 14 |
| Energy industry | 5 |
| Environment | 3 |
| Forestry | 2 |
| Gear train | 22 |
| General | 6 |
| Health care | 1 |
| High energy physics | 3 |
| Ichthyology | 1 |
| Industry | 7 |
| Information technology | 1 |
| Law | 1 |
| Life sciences | 2 |
| Machinery and mechanisms | 1 |
| Measuring instruments | 3 |
| Mechanic engineering | 85 |
| Medical | 5 |
| Metallurgy | 6 |
| Mineral products | 3 |
| Natural resourses and wildlife conservation | 3 |
| Natural sciences | 4 |
| Paragliding | 2 |
| Physical sciences | 2 |
| Power lines | 1 |
| Scientific | 2 |
| Sports | 2 |
| Technology | 38 |
| Telegraphy | 1 |
| Textile industry | 3 |
| Transport | 224 |