ultrasonic flow超声波流量ultrasonicadj.超声波的ultrasonic electro discharge machining超声电火花加工ultrasonic position measurement system超声波物位检测系统ultrasonic tissue-mimicking material超声仿人体材料Ultrasonic pulse nonlinear propagation超声波非线性传播ultrasonic and rebound combined method超声回弹综合法ultrasonic tissue transjuquiar phantom超声组织仿真模块仿体ultrasonic endodontic obturation method超生波震动热压充填法Ultrasonic axial transmission technique超声轴向传播技术Ultrasonic Diagnosis of Epidermoid Cyst表皮囊肿的超声诊断ultrasonic wave echo measuring distance超声波回波测距