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| oxonium base (R₃O・OH) | |||
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锌碱 : 23 phrases in 10 subjects |
| Accumulators | 2 |
| Air defense | 1 |
| Aviation | 2 |
| Chemistry | 3 |
| Electric machinery | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 1 |
| Pharmacology | 1 |
| Space | 2 |
| Technology | 6 |
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