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1. 上下层窗空间：span length 跨间距离 | spandrel 上下层窗空间 | spandrel beam 外墙托梁
2. 三角槽 ,拱腔：spandrel arch 侧增拱 ,腔拱 | spandrel 三角槽 ,拱腔 | span depth ratio 跨深比
noun
1. spandrel的反义词
1. an approximately triangular surface area between two adjacent arches and the horizontal plane above them
Synonym: spandril