| 单词 | chill-hardening | 
| 释义 | > as lemmaschill-hardening   chill-hardening  n.  Brit.  , U.S.   (see quot. 1874).Π 1874    E. H. Knight Pract. Dict. Mech.  				Chill-hardening, a mode of tempering steel-cutting instruments, by exposing the red-hot metal to a blast of cold air. < as lemmas  | 
	
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