短語詞組短語ultrasonic pulse transmission method 超聲脈沖透射檢騐法ultrasonic pulse velocity method 超聲脈沖速度法ultrasonic pulse reflection method 超聲脈沖反射法ultrasonic pulse -echo method 超聲脈沖反射法the ultrasonic pulse -echo method 超聲脈沖反射法 返回 ultrasonic pulse method