| 单词 | perforated zinc | 
| 释义 | Definition of perforated zinc in English:perforated zincnoun historical 
 OriginMid 19th century; earliest use found in Harper's Magazine. Definition of perforated zinc in US English:perforated zincnoun historical 
 OriginMid 19th century; earliest use found in Harper's Magazine.  | 
	
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