ultrasonic wave

• 超声波

ultrasonic wave的用法和样例：

例句

1. However, ultrasonic checks showed cracks in the seams.
   但是超声波检查，表明焊缝还有裂纹。
2. Standing wave LUM is the mainstream of the research of the LUM.
   驻波型直线电机是直线型超声波电机发展的主流。