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| m-ary tree | |||
| 元树: 19 phrases in 10 subjects |
| Chemistry | 1 |
| Construction | 1 |
| General | 1 |
| Information technology | 5 |
| Polygraphy | 2 |
| Polymers | 1 |
| Programming | 1 |
| Space | 1 |
| Technology | 5 |
| Telecommunications | 1 |
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