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声 振荡 : 59 phrases in 14 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Aviation | 3 |
| Drilling | 1 |
| Electronics | 14 |
| General | 1 |
| Geophysics | 6 |
| Metallurgy | 2 |
| Oil / petroleum | 2 |
| Refrigeration | 1 |
| Space | 5 |
| Technology | 19 |
| Telecommunications | 2 |
| Textile industry | 1 |
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