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| English thesaurus | |||
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| UPD (Organization of American States) | |||
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Unit : 93 phrases in 10 subjects |
| Economics | 4 |
| Electric motors | 1 |
| Electrical engineering | 13 |
| Electricity generation | 21 |
| Electronics | 9 |
| Mathematics | 23 |
| Metrology | 17 |
| Power system protection | 3 |
| Thermal Energy | 1 |
| Transformers | 1 |