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| 41. | mole drainage |
| 鼠道排水 |
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| 42. | drainage management |
| 排水管理 |
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| 43. | drainage sluice |
| 排水闸 |
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| 44. | drainage receiver |
| 排水容泄区 |
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| 45. | gas drainage |
| 瓦斯抽放 |
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| 46. | road drainage |
| 道路排水 |
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| 47. | drainage experiment |
| 排水试验 |
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| 48. | drainage network |
| 水系 |
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| 49. | surface drainage |
| 路面排水 |
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| 50. | equilibrium drainage |
| 均衡排泄 |
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