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| 扇形穹顶 | |||
| 扇状展开的拱顶构造; 扇形穹拱; 扇状拱顶; 扇形拱 (顶); 扇肋拱顶由扇形网状肋构成; 扇形拱顶 | |||
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fan vault : 2 phrases in 1 subject |
| Technology | 2 |
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