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| vertical mobility | |||
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垂直 流动 : 10 phrases in 8 subjects |
| Earth sciences | 2 |
| International trade | 1 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Rail transport | 1 |
| Refrigeration | 1 |
| Technology | 2 |
| Water resources | 1 |
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