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| |||
| 地面排水沟 | |||
| 明沟 | |||
| 地表排水; 排水沟 | |||
| 路面排水; 明沟排水; 排涝沟; 地面排水 (沟) | |||
| 地面排水 | |||
| surface drain: 15 phrases in 7 subjects |
| Architecture | 1 |
| Bridge construction | 1 |
| Electronics | 2 |
| Engineering geology | 1 |
| Oil / petroleum | 1 |
| Technology | 8 |
| Water resources | 1 |
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