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| 71. | mole drainage plough |
| 暗沟排水犁 |
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| 72. | natural soil drainage |
| 土壤自然排水 |
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| 73. | international drainage basi |
| 国际排水盆地 |
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| 74. | agricultural drainage |
| 农田排水|农业排水系统 |
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| 75. | Drainage Authority Area |
| 排水监管区 |
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| 76. | clay pipe drainage |
| 瓦管排水 |
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| 77. | well type drainage |
| 井式排水 |
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| 78. | drainage receiver |
| 排水容泄区 |
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| 79. | alkaline mine drainage |
| 矿山碱性排水 |
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| 80. | external drainage |
| 外流水系；明沟排水 |
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