 |
| portance: 79 phrases in 14 subjects |
| Aviation | 1 |
| Coal | 2 |
| Communications | 2 |
| Construction | 2 |
| Earth sciences | 21 |
| Environment | 1 |
| Industry | 1 |
| Life sciences | 1 |
| Mechanic engineering | 2 |
| Mineral products | 1 |
| Natural sciences | 3 |
| Paragliding | 1 |
| Physical sciences | 1 |
| Transport | 40 |