 |
| Erforschung: 32 phrases in 16 subjects |
| Astronomy | 1 |
| Aviation | 2 |
| Education | 2 |
| Finances | 3 |
| Foreign trade | 6 |
| General | 1 |
| Geology | 2 |
| Geophysics | 2 |
| Historical | 1 |
| Hydrology | 1 |
| Metrology | 1 |
| Military | 1 |
| Natural resourses and wildlife conservation | 3 |
| Shipbuilding | 2 |
| Technology | 3 |
| Water supply | 1 |