| 单词 | mortar casemate | 
| 释义 | > as lemmasmortar casemate ΚΠ 1879    Cassell's Techn. Educator 		(new ed.)	 IV. 138/2  				Mortar casemates are vaulted chambers without a front wall employed..to secure the mortars of the fortresses from vertical fire. < as lemmas | 
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