【摘要】 对超声波在夹层金属平行板层面的反射和透射进行了分析和极限处理，从而导出了各层面回波之间的相互关系．更多还原

【Abstract】 Both the renection and transmission of ultrasonic waves at the interfaces of a multi - layer plate with a thin mid - layer were analyzed and treated utilizing an approaching method. Thus the relations between the reflected waves were derived.更多还原