 |
| centre line: 49 phrases in 14 subjects |
| Astronomy | 1 |
| Aviation | 19 |
| Construction | 3 |
| Earth sciences | 1 |
| General | 1 |
| Hobbies and pastimes | 1 |
| Hydrology | 1 |
| Information technology | 1 |
| Materials science | 1 |
| Mechanic engineering | 2 |
| Medical | 1 |
| Metallurgy | 1 |
| Technology | 1 |
| Transport | 15 |