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three-centered
| arch
| three-centered | |
| tech. | 三心的 |
| arch | |
| geol. | 背斜 |
| hydroel.st. | 拱 |
| met. | 拱顶; 炉拱 |
| oil | 穹隆; 鞍状构造 |
| space | 弧; 半圆形; 拱形物 |
| |||
| 三心的 | |||
| three-centered: 14 phrases in 7 subjects |
| Architecture | 1 |
| Bridge construction | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 1 |
| Rail transport | 1 |
| Technology | 8 |
| Water resources | 1 |
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