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拱圈中心
meaning in Chinese
arch center
Related Words
横向拱
缺口拱
拱石
向上拱
回廊拱
弧拱
板拱
塌落拱
端拱
抑拱
拱圈施工缝
拱圈应力调整
拱圈中心角
拱圈砖
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