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| 61. | drainage experiment |
| 排水试验 |
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| 62. | sewage pump house |
| 污水泵房 |
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| 63. | septic tank effluent |
| 化粪池污水 |
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| 64. | road drainage |
| 道路排水 |
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| 65. | municipal sewage |
| 城市污水 |
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| 66. | gas drainage |
| 瓦斯抽放 |
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| 67. | drainage management |
| 排水管理 |
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| 68. | surface drainage |
| 路面排水 |
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| 69. | drainage sluice |
| 排水闸 |
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| 70. | mole drainage |
| 鼠道排水 |
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