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		基于声发射矩张量分析混凝土破坏的裂纹运动 1)
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			INVESTIGATION ON CRACK GROWTH IN CONCRETE BY MOMENT TENSOR ANALYSIS OF ACOUSTIC EMISSION 1)
			 
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		 图12. 不同应力水平下混凝土试件内裂纹演化(试件3)  | 
	
Fig.12. Evolution of cracks in concrete specimens under different stress state (specimen 3)  | 
	
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