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| direct oxidation | |||
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| direct oxidation | |||
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| direct oxidation | |||
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直 接氧化 : 16 phrases in 8 subjects |
| Animal husbandry | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Electronics | 2 |
| Metallurgy | 4 |
| Oil / petroleum | 1 |
| Oil processing plants | 2 |
| Technology | 4 |
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