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sunk shaft
| foundation
| sunk shaft | |
| el. | 沉井 |
| eng.geol. | 沉井 |
| hydroel.st. | 沉井 |
| foundation | |
| gen. | 创办; 建立 |
| cosmet. | 粉底 |
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| 沉井基础 | |||
| |||
| 沉井基础 | |||
| 沉井 | |||
| 沉井基础; 矿井下沉; 竖井下沉; 竖井沉基 | |||
| sunk shaft: 3 phrases in 3 subjects |
| Engineering geology | 1 |
| Mining | 1 |
| Technology | 1 |
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