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| 化学氧化 | |||
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chemical oxidation : 22 phrases in 8 subjects |
| Ecology | 2 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 1 |
| Metallurgy | 2 |
| Technology | 9 |
| Telecommunications | 1 |
| Water resources | 5 |
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