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阀 动 作 : 40 phrases in 11 subjects |
| Automobiles | 6 |
| Aviation | 4 |
| Compressors | 1 |
| Electronics | 4 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Space | 9 |
| Technology | 11 |
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