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| cyclic regeneration | |||
| cyclical regeneration | |||
| 循环再生: 18 phrases in 9 subjects |
| Animal husbandry | 1 |
| Automobiles | 1 |
| Ecology | 4 |
| Electronics | 2 |
| Oil / petroleum | 3 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 4 |
| United Nations | 1 |
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