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| 81. | raidal drainage |
| 径向排液 |
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| 82. | subglacial drainage |
| 冰下水系 |
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| 83. | indoor drainage |
| 室内排水 |
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| 84. | blocking drainage |
| 阻塞水系 |
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| 85. | juvenile drainage |
| 初生水系 |
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| 86. | beaded drainage |
| 连珠小河 |
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| 87. | central drainage |
| 集中排水 |
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| 88. | batter drainage |
| 斜向排水沟 |
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| 89. | impeded drainage |
| 不良排水 |
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| 90. | contour drainage |
| 围线排水 |
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