Intrados
[in'treidɒs]
解释:
(n.) The interior curve of an arch; esp., the inner or lower curved face of the whole body of voussoirs taken together. See Extrados.
录入:威廉姆斯
解释:
n. (archit.) the interior or lower line or surface of an arch or vault:—opp. to Extrados the exterior or upper curve.
费格斯录入