horseshoe arch
... arch block 拱面石,拱块... horseshoe arch 马蹄形拱 arch camber 起拱,拱矢,拱翘起...
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圆马蹄形拱 round horseshoe arch
·2,447,543篇论文数据，部分数据来源于NoteExpress
综合比较来看，封闭式支架要优于不封闭支架；马蹄形或方环形支架要比半圆拱等支护形式好。
Compared comprehensively, enclosed supports are better than non-enclosed supports; supports of square annular shape or "u" shape are better than supports of semicircle arch.
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