Low pass effect of surface defect metal based on laser ultrasonic
Acta Physica Sinica
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Acta Phys. Sin.  2008, Vol. 57 Issue (12): 7765-7769    
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Low pass effect of surface defect metal based on laser ultrasonic
Wang Jing-Shi, Xu Xiao-Dong, Liu Xiao-Jun, Xu Gang-Can
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