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| Blockkette f | |||
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block chain : 17 phrases in 9 subjects |
| Construction | 1 |
| General | 2 |
| Machinery and mechanisms | 2 |
| Mathematics | 1 |
| Metallurgy | 1 |
| Mining | 1 |
| Statistics | 1 |
| Technology | 4 |
| Transport | 4 |
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