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| English thesaurus | |||
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| Texas Natural Resources Conservation Commission | |||
| DC-3 plane (the Three) | |||
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three- axis : 20 phrases in 7 subjects |
| Communications | 4 |
| Electronics | 5 |
| General | 1 |
| Information technology | 6 |
| Mechanic engineering | 1 |
| Satellite communications | 1 |
| Transport | 2 |