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recherche technique : 46 phrases in 10 subjects |
| Economics | 2 |
| Environment | 2 |
| General | 2 |
| Materials science | 2 |
| Name of organization | 27 |
| Natural sciences | 3 |
| Obsolete / dated | 2 |
| Patents | 1 |
| Politics | 3 |
| Research and development | 2 |