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| 刚心: 52 phrases in 12 subjects |
| Drilling | 9 |
| Earth sciences | 2 |
| Electronics | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |
| Mechanics | 4 |
| Metallurgy | 2 |
| Nautical | 1 |
| Oil / petroleum | 11 |
| Refrigeration | 1 |
| Technology | 17 |
| Wind Energy | 1 |
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