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control pitch : 82 phrases in 14 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Automobiles | 3 |
| Aviation | 23 |
| Chemistry | 1 |
| Electronics | 5 |
| General | 1 |
| Mechanic engineering | 3 |
| Nautical | 3 |
| Shipbuilding | 1 |
| Space | 8 |
| Technology | 13 |
| Telecommunications | 5 |
| Wind Energy | 14 |
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