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| center arch; centre arch | |||
| 中心拱: 44 phrases in 8 subjects |
| Architecture | 3 |
| Bridge construction | 4 |
| Earth sciences | 1 |
| Electronics | 2 |
| Engineering geology | 1 |
| General | 1 |
| Hydroelectric power stations | 12 |
| Technology | 20 |
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