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		圆锥压头递增载荷对材料的划痕行为
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			Scratch Behavior of Materials under Progressive Load by Conical Indenter
			 
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		 图2. 压入深度d、残余深度dr和划痕保持率r=dr/d随载荷Fn的变化  | 
	
Fig.2. Variation of penetration depth d, residual depth dr and scratch retention r=dr/d with applied load Fn  | 
	
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