The difference in amplitude and energy of seismic wave between fracture cave zones and surrounding rock is an indicator of fractures and caves.
利用这种差异来进行缝洞检测，必须对缝洞岩层的地震波反射特征有一个全面的了解。
Objective:To evaluate the diagnostic value of F wave in diabetic peripheral neuropathy (DPN) by comparing the difference in F wave between diabetes mellitus and healthy subjects.
目的：研究糖尿病患者及健康人F波，探讨其对诊断糖尿病周围神经病（DPN）的意义。
Objective:To evaluate the diagnostic value of F wave in diabetic peripheral neuropathy (DPN) by comparing the difference in F wave between diabetes mellitus and healthy subjects.
目的：研究糖尿病患者及健康人F波，探讨其对诊断糖尿病周围神经病（DPN）的意义。
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