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 | Từ điển Oxford Advanced Learner 8th 
 
	
		| overhead projector 
  
 
 ˌoverhead proˈjector  [overhead projector] BrE NAmE   noun  (abbr.OHP)
 a piece of equipment that projects an image onto a wall or screen so that many people can see it
 •She used an overhead projector to illustrate her talk.
 compare  ↑data projector, ↑slide projector
 
 
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