● 碹xuàn ㄒㄩㄢˋ
◎ 桥梁、涵洞等工程建筑的弧形部分。
◎ 用砖、石等筑成弧形。
◎ 碹 xuàn 〈名词〉桥梁、涵洞等工程建筑中永久性拱形支架
◎ 碹 xuàn 〈动词〉用砖、石等砌拱。如:碹涵洞;碹拱;碹窑
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