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| crown; roof | |||
| 洞 顶: 53 phrases in 10 subjects |
| Architecture | 3 |
| Bridge construction | 4 |
| Desert science | 1 |
| Electronics | 4 |
| Engineering geology | 3 |
| General | 2 |
| Hydroelectric power stations | 3 |
| Mountaineering | 1 |
| Technology | 29 |
| Wind Energy | 3 |
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