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frequency- type : 41 phrases in 11 subjects |
| Air defense | 4 |
| Communications | 1 |
| Construction | 1 |
| Electronics | 8 |
| General | 2 |
| Information technology | 1 |
| Metallurgy | 1 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 20 |
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