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| 拱形楼板; 穹楼板 | |||
| 拱起; 穹形板; 拱形屋盖 | |||
| 圆拱式顶盖 | |||
| 拱 (静力学); 拱顶 | |||
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сводчатое перекрытие : 1 phrase in 1 subject |
| General | 1 |
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