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| |||
| 尽头沟; 尽头地下排水沟 | |||
| 渗沟 | |||
| 地下疏水 | |||
| 暗管 | |||
| 暗渠; 暗沟; 阴沟 | |||
| 盲沟 | |||
| 渗水暗沟 | |||
| 暗渗管道; 排水暗沟; 死排水沟; 石砌排水沟 | |||
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blind drain : 9 phrases in 3 subjects |
| Bridge construction | 5 |
| Rail transport | 1 |
| Technology | 3 |
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