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| self-loop | |||
| 自回路: 23 phrases in 9 subjects |
| Architecture | 1 |
| Computer numerical control | 1 |
| Electronics | 7 |
| Geophysics | 3 |
| Metallurgy | 1 |
| Space | 2 |
| Technology | 5 |
| Telecommunications | 2 |
| Textile industry | 1 |
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