| 单词 | spall | 
| 释义 | spall [spȯl]  ENGINEERING 1. To reduce irregular stone blocks to an approximate size by chipping with a hammer.  2. To break off thin chips from, and parallel to, the surface of a material, such as a metal or rock.  GEOLOGY 1. A fragment removed from the surface of a rock by weathering.  2. A relatively thin, sharp-edged fragment produced by exfoliation.  3. A rock fragment produced by chipping with a hammer.  MINING ENGINEERING To break ore.  ORDNANCE A fragment torn from the surface of an armor plate.  | 
	
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