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| English thesaurus | |||
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| NC | |||
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national coarse : 10 phrases in 7 subjects |
| Automobiles | 2 |
| Drilling | 2 |
| Mechanic engineering | 2 |
| Mechanics | 1 |
| Oil / petroleum | 1 |
| Rail transport | 1 |
| Technology | 1 |
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