ultrasonic sensor ultrasonic transducer 超声波传感器 material for ultrasonic transducer 释义超声换能器材料 multiple ultrasonic transducer combination 多超声波换能器组合 ..
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超声换能器材料 material for ultrasonic transducer; transducer,material for ultrasonic 穿刺超声换能器 puncture transducer .
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