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verharder : 23 phrases in 12 subjects |
| Agriculture | 3 |
| Chemistry | 1 |
| Construction | 1 |
| Earth sciences | 2 |
| Environment | 2 |
| Industry | 2 |
| Life sciences | 4 |
| Materials science | 1 |
| Metallurgy | 1 |
| Pharmacy and pharmacology | 1 |
| Transport | 4 |
| Waste management | 1 |
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