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false ellipse
| arch
| false ellipse | |
| archit. | 三心装饰拱 |
| arch | |
| geol. | 背斜 |
| hydroel.st. | 拱 |
| met. | 拱顶; 炉拱 |
| oil | 穹隆; 鞍状构造 |
| |||
| 三心装饰拱 | |||
| 五心拱券; 近似椭圆; 圆弧椭圆 | |||
| false ellipse: 4 phrases in 1 subject |
| Technology | 4 |
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