drainage : 116 phrases in 15 subjects |
Agriculture | 35 |
Construction | 19 |
Earth sciences | 5 |
Economy | 1 |
Environment | 9 |
European Union | 1 |
Forestry | 1 |
General | 8 |
Industry | 2 |
Life sciences | 25 |
Mechanic engineering | 5 |
Mining | 1 |
Natural sciences | 2 |
Technology | 1 |
Transport | 1 |