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 |