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热力 管 : 20 phrases in 10 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| China | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 2 |
| Space | 5 |
| Technology | 6 |
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