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| 31. | drainage network |
| 水系 |
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| 32. | drainage sluice |
| 排水闸 |
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| 33. | gas drainage |
| 瓦斯抽放 |
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| 34. | equilibrium drainage |
| 均衡排泄 |
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| 35. | drainage experiment |
| 排水试验 |
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| 36. | mole drainage |
| 鼠道排水 |
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| 37. | surface drainage |
| 路面排水 |
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| 38. | drainage receiver |
| 排水容泄区 |
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| 39. | road drainage |
| 道路排水 |
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| 40. | electrical drainage |
| 电排流 |
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