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发生炉气 : 111 phrases in 12 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Architecture | 1 |
| Automobiles | 5 |
| Aviation | 1 |
| Chemistry | 4 |
| Environment | 1 |
| General | 3 |
| Metallurgy | 34 |
| Nautical | 1 |
| Refrigeration | 1 |
| Technology | 58 |
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