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拱脚线
meaning in English
spring line
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
拱脚手架
拱脚推力
拱脚斜块
拱脚支撑松弛
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