【摘 要】
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Background,Motivation and Objective In the ultrasonic transducer,a backing layer is generally made of composite material using metal powder and polymer to provide proper attenuation coefficient and ac
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Background,Motivation and Objective In the ultrasonic transducer,a backing layer is generally made of composite material using metal powder and polymer to provide proper attenuation coefficient and acoustic impedance.Also,the thickness of the backing layer is usually thick enough to attenuate incoming and reflecting waves.
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