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タグ : 74 phrases in 9 subjects |
| Aviation | 1 |
| Information technology | 1 |
| Metallurgy | 4 |
| Mineralogy | 1 |
| Mining | 1 |
| Radioengineering | 1 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Technology | 63 |
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