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| 1. | horizontal ditch |
| 水平沟 |
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| 2. | open ditch drainage |
| 明沟排水 |
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| 3. | open drain system |
| 明沟排水系统 |
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| 4. | ditch retardation |
| 沟蓄 |
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| 5. | management of open drain system |
| 明沟排水系统管理 |
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| 6. | Code for design of drain-channel for petrochemical industry |
| 石油化工排雨水明沟设计规范 |
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| 7. | open drain test |
| 明沟排水试验 |
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| 8. | transverse ditch |
| 腰沟 |
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| 9. | external drainage |
| 外流水系；明沟排水 |
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| 10. | principal ditch |
| 干渠 |
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