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		等值反磁通瞬变电磁法在金矿采空区探测中的应用
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			Application of the opposing coils transient electromagnetic method in investigation of mined-out areas of a gold deposit
			 
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		 图6. 采空区三维可视化建模示意  | 
	
Fig.6. Schematic diagram of 3D visualization modeling of goaf  | 
	
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