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声 速 流 : 49 phrases in 15 subjects |
| Agriculture | 1 |
| Architecture | 1 |
| Aviation | 7 |
| Chemistry | 1 |
| Compressors | 2 |
| Construction | 1 |
| Earth sciences | 6 |
| Fishery fishing industry | 1 |
| General | 1 |
| Geophysics | 1 |
| Hydroelectric power stations | 3 |
| Space | 10 |
| Technology | 12 |
| Transport | 1 |
| Wind Energy | 1 |
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