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氧化型 : 20 phrases in 9 subjects |
| Ecology | 1 |
| Electronics | 2 |
| General | 8 |
| Medical | 2 |
| Metallurgy | 1 |
| Microelectronics | 1 |
| Polymers | 1 |
| Technology | 3 |
| Welding | 1 |
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