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| vertical spacing | |||
| between perpendiculars | |||
| perpendicular separation | |||
| vertical interval; vertical separation | |||
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| between perpendiculars | |||
| 垂直 间距: 7 phrases in 6 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Hydroelectric power stations | 1 |
| Technology | 2 |