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平稳态 : 22 phrases in 10 subjects |
| Bridge construction | 1 |
| Business | 2 |
| Chemistry | 1 |
| Desert science | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 10 |
| Wind Energy | 1 |
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