ultrasonic unit超声波装置ultrasonicadj.超声波的ultrasonic electrostatictransducer超声静电换能器ultrasonic liquid Doppler flowmeter超声多普勒液体流量计ultrasonic hand-washing apparatus超声洗手装置ultrasonic flaw-detecting machine超声波探伤机ultrasonicwave-assited extraction超声波提取ultrasonic electrostatic transducer超声静电换能器Ultrasonic wave arm hole machine.超声波袖笼机。ultrasonic Doppler vessel indicator超声多普勒血管检测器ultrasonic frequency response model超声频响模型ultrasonic-absolute-positioning超声波绝对定位