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| 污水管道〔线〕 | |||
| 下水管道 | |||
| 污水管道; 污水管线 | |||
| 下水管线; 下水道管 | |||
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sewer line : 12 phrases in 3 subjects |
| Metallurgy | 2 |
| Technology | 9 |
| Textile industry | 1 |
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