springing line
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/spɹˈɪŋɪŋ lˈaɪn/
British pronunciation
/spɹˈɪŋɪŋ lˈaɪn/

"springing line"的定义和意义

Springing line
01

起拱线, 连接一系列拱门或拱顶起拱点的假想水平线

an imaginary horizontal line that connects the springing points of a series of arches or vaults
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