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sine- wave : 66 phrases in 11 subjects |
| Air defense | 9 |
| Aviation | 3 |
| Bridge construction | 1 |
| Electric machinery | 5 |
| Electronics | 8 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Oil / petroleum | 2 |
| Space | 3 |
| Technology | 31 |
| Telecommunications | 1 |
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