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| 波纹式: 51 phrases in 11 subjects |
| Automobiles | 8 |
| Chemistry | 2 |
| Compressors | 2 |
| Geophysics | 1 |
| Hydroelectric power stations | 4 |
| Oil / petroleum | 6 |
| Space | 3 |
| Technology | 20 |
| Textile industry | 2 |
| Water resources | 2 |
| Wind Energy | 1 |
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