| 单词 | heart cam | 
| 释义 | Definition of heart cam in English:heart camnoun Mechanics 
 OriginMid 19th century; earliest use found in The London Journal of Arts and Science. Definition of heart cam in US English:heart camnoun Mechanics 
 OriginMid 19th century; earliest use found in The London Journal of Arts and Science.  | 
	
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