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半 柱 : 77 phrases in 13 subjects |
| Acrobatics | 2 |
| Agriculture | 4 |
| Architecture | 10 |
| Biotechnology | 1 |
| Chemistry | 1 |
| Construction | 2 |
| Electronics | 3 |
| General | 5 |
| Metallurgy | 5 |
| Nautical | 3 |
| Oil / petroleum | 3 |
| Space | 1 |
| Technology | 37 |
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