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| Forschungs-; Erforschungs-; Versuchs- | |||
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изследователски : 14 phrases in 7 subjects |
| Coal | 1 |
| Construction | 2 |
| Economy | 7 |
| Environment | 1 |
| Mineral products | 1 |
| Research and development | 1 |
| Work flow | 1 |
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