 |
| depurazione: 130 phrases in 16 subjects |
| Agriculture | 7 |
| Chemistry | 18 |
| Coal | 2 |
| Earth sciences | 2 |
| Ecology | 3 |
| Economy | 1 |
| Environment | 50 |
| Fish farming pisciculture | 1 |
| General | 20 |
| Hygiene | 1 |
| Industry | 7 |
| Mechanic engineering | 6 |
| Medical | 2 |
| Natural sciences | 2 |
| Patents | 5 |
| Transport | 3 |