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| 吸出管; 尾水管 | |||
| 导尾(水)，通风，吸出，吸人，引流管 | |||
| 通风管 | |||
| 吸引管; 引流管; 导管 | |||
| |||
| 导尾(水)，通风，吸出，吸人，引流管 | |||
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draught tube : 15 phrases in 2 subjects |
| Hydroelectric power stations | 10 |
| Technology | 5 |
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