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拱圈
| 中心轨迹线
| 拱圈 | |
| el. | horizontal arch element |
| hydroel.st. | arch ring |
| 中心轨迹线 | |
| tech. | line of centers; locus of center |
| |||
| horizontal arch element | |||
| arch ring | |||
| arc; arch block; ring; ring course (层) | |||
| |||
| arch barrel | |||
| 拱圈: 88 phrases in 10 subjects |
| Architecture | 4 |
| Bridge construction | 11 |
| Construction | 2 |
| Electronics | 3 |
| Engineering geology | 3 |
| General | 2 |
| Hydroelectric power stations | 9 |
| Metallurgy | 1 |
| Rail transport | 2 |
| Technology | 51 |
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