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| 双重压力 | |||
| dual-pressure: 34 phrases in 10 subjects |
| Agriculture | 1 |
| Automobiles | 7 |
| Chemistry | 1 |
| Drilling | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Metallurgy | 10 |
| Oil / petroleum | 5 |
| Refrigeration | 2 |
| Technology | 5 |
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