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| 向后折叠; 返送监听系统; 双折电缆 | |||
| 返送系统; 监听系统 | |||
| 具折叠的; 具回折的 | |||
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foldback : 10 phrases in 6 subjects |
| Agriculture | 3 |
| Animal husbandry | 1 |
| General | 1 |
| Molecular genetics | 2 |
| Shipbuilding | 1 |
| Technology | 2 |
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