píng gǒng
意思解释：（Make the same score arch）我国有些石桥的拱形不是半个圆，而只是圆弧的一段，拱的弧矢和跨度相比要小的多，这样的拱称“平拱”。
我国有些石桥的拱形不是半个圆，而只是圆弧的一段，拱的弧矢和跨度相比要小的多，这样的拱称“平拱”。茅以升《重点文物保护单位中的桥》:“我国石拱，一般都是半圆形，如卢沟桥，但这个桥(赵州桥)的拱形却不是半个圆，而只是圆弧…
What our country has some of Shi Qiao is vaulted not be half circles, is a paragraph of circular arc only, many the arc arrow of arch and span photograph are smaller than wanting, such arch says smooth arch . Mao Yisheng the bridge in unit of protection of key cultural relic : Unplug word of dust of nocturnal is stupefied of Bian of of danger of incomplete of the Qu before border ascends bridge of city of Zhao of of a small tinkling bell of Sun of bovine ) vaulted not be half circle however, is circular arc only...
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