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复式 泵 : 56 phrases in 12 subjects |
| Automobiles | 2 |
| Chemistry | 1 |
| Construction | 1 |
| Drilling | 5 |
| Ecology | 2 |
| Electronics | 1 |
| Engineering geology | 2 |
| Hydroelectric power stations | 2 |
| Metallurgy | 3 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 2 |
| Technology | 34 |
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