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Từ điển WordNet v3.1 - WordNet Dictionary 
	
		  center punch   
  a tool with a conical point that is used to make indentations in metal (especially to mark points for drilling) • Hypernyms: punch, puncher
  make a small hole in something as a guide for a drill (Freq. 2) • Hypernyms: pierce, thrust • Verb Frames: - Somebody ----s something - Something ----s something
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