| 单词 | keystone mask | 
| 释义 | > as lemmaskeystone mask   keystone mask  n. Architecture a sculpture or relief of a person's face used to decorate a keystone. ΚΠ 1855    J. Timbs Curiosities of London 536  				Marble keystone mask from Pompeii. 1890    Daily News 26 Nov. 7/3  				The quite famous sculptured keystone-masks on the east and west sides of the central arch of Henley Bridge. 1980    Rec. Columbia Hist. Soc. 50 318  				The artist who executed these spandrel figures and keystone masks is unknown. < as lemmas  | 
	
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