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字形 管 : 21 phrases in 10 subjects |
| Architecture | 2 |
| Construction | 2 |
| Electronics | 2 |
| General | 1 |
| Metallurgy | 1 |
| Plastics | 1 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Technology | 9 |
| Telecommunications | 1 |
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