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| cyclic addition; cyclical addition | |||
| 成环加成: 31 phrases in 9 subjects |
| Automobiles | 1 |
| Chemistry | 5 |
| General | 3 |
| Oil / petroleum | 2 |
| Plastics | 3 |
| Polymers | 5 |
| Project management | 1 |
| Space | 1 |
| Technology | 10 |
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