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| 下池; 抽水蓄能水电站下库 | |||
| 下水库; 下游水库; 下库 | |||
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| 下储风缸 | |||
| lower reservoir: 7 phrases in 3 subjects |
| Oil / petroleum | 1 |
| Refrigeration | 1 |
| Technology | 5 |
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