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effluent : 82 phrases in 13 subjects |
| Agriculture | 8 |
| Chemistry | 14 |
| Construction | 11 |
| Environment | 12 |
| General | 2 |
| Geology | 1 |
| Geophysics | 1 |
| Hydraulic engineering | 3 |
| Melioration | 4 |
| Natural resourses and wildlife conservation | 11 |
| Nautical | 1 |
| Nuclear physics | 4 |
| Technology | 10 |