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| 备用泵; 供水泵; 补充泵 | |||
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| 供 〔给〕水泵 | |||
| 补给泵; 补给水泵 | |||
| 供水泵; 补充泵 | |||
| 给水泵; 补充水泵 | |||
| make -up pump: 6 phrases in 4 subjects |
| Electronics | 3 |
| Hydroelectric power stations | 1 |
| Nuclear and fusion power | 1 |
| Technology | 1 |
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